Answer:
To estimate the total weight of the pet food Adam buys, we can use benchmark fractions to compare the weight of the dog food (7/8 pound) and the weight of the cat food (1 3/4 pounds) to a benchmark fraction that we are familiar with.
We know that 1 whole pound is equal to 16 ounces. So, we can use this as a benchmark to estimate the weight of the dog food and cat food.
First, we'll convert 7/8 pound to ounces. 7/8 pound is equal to 7/8 * 16 = 14 ounces
Next, we'll convert 1 3/4 pound to ounces. 1 3/4 pound is equal to 1 * 16 + 3/4 * 16 = 16 + 12 = 28 ounces.
Now we can add the weight of the dog food and the cat food to get the total weight of the pet food Adam buys.
14 ounces + 28 ounces = 42 ounces
So, the total weight of the pet food Adam buys is approximately 42 ounces, which is roughly 2.6 pounds.
The estimate was made with benchmark fractions, which allows us to make a rough estimation of the weight of the pet food, but it's not as precise as the exact weight in pound or ounces.
A miner is working 184 feet below the surface of the earth. He climbs 53 feet to get a tool and then descends 168 feet. Write his current elevation as an integer, relative to the earth's surface.
Answer:
-299 ft
Step-by-step explanation:
Start: -184 ft
Climb: + 53 ft
Descent: - 168 ft
-184 ft + 53 ft - 168 ft = -299 ft
Answer: -299 ft
Was told to solve in pairs, not much information was given.
The solution to the first system of equations is given as follows:
(0, -0.6).
The solution to the second system of equations is given as follows:
(0.64, 1.18).
How to solve the system of equations?The first system of equations is given as follows:
7x - 10y = 6.14x - 5y = 3.Multiplying the first equation by -2, the system is given as follows:
-14x + 20y = -12.14x - 5y = 3.Adding the two equations, the solution for y is given as follows:
15y = -9
y = -9/15
y = -0.6.
Hence the solution for x is of:
7x - 10(-0.6) = 6
7x + 6 = 6
x = 0.
The second system of equations is given as follows:
2x + 6y = 9.-3x + 5y = 4.Multiplying the first equation by 3 and the second by 2, we have that:
6x + 12y = 18.-6x + 10y = 8.Adding them, the solution for y is obtained as follows:
22y = 26
y = 26/22
y = 1.18.
The solution for x is of:
6x + 12(1.18) = 18
x = (18 - 12 x 1.18)/6
x = 0.64.
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given a closed box, where the length is twice the height, the width is 10 meters less than the length, and the surface area is 10 times the width times the height, what are the dimensions?
So the dimensions of the box are:
Length: 20m
Width: 10m
Height: 10m
We can use the information provided in the problem to set up a system of equations. Let H be the height, L be the length, and W be the width.
From the problem, we know:
L = 2H (the length is twice the height)
W = L - 10 (the width is 10 meters less than the length)
2HW + 2LW + 2LH = 10WH (the surface area is 10 times the width times the height)
We can substitute the first and second equations into the third one to obtain:
2H(2H-10) + 2(2H)(2H-10) + 2(2H)(2H) = 10H(2H-10)
Solving this equation we get H = 10m
With this value we can solve for the other dimensions:
L = 2H = 2 * 10 = 20m
W = L - 10 = 20 - 10 = 10m
So the dimensions of the box are:
Length: 20m
Width: 10m
Height: 10m
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So the dimensions of the box are:
Length: 20m
Width: 10m
Height: 10m
We can use the information provided in the problem to set up a system of equations. Let H be the height, L be the length, and W be the width.
From the problem, we know:
L = 2H (the length is twice the height)
W = L - 10 (the width is 10 meters less than the length)
2HW + 2LW + 2LH = 10WH (the surface area is 10 times the width times the height)
We can substitute the first and second equations into the third one to obtain:
2H(2H-10) + 2(2H)(2H-10) + 2(2H)(2H) = 10H(2H-10)
Solving this equation we get H = 10m
With this value we can solve for the other dimensions:
L = 2H = 2 * 10 = 20m
W = L - 10 = 20 - 10 = 10m
So the dimensions of the box are:
Length: 20m
Width: 10m
Height: 10m
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a water system of 2 in. (inside diameter) pipe, having a length of 1 4 mile, is to be flushed with a volume of water equal to twice that contained in the system. how much water (gallons) must be flushed through the system?
To flush twice the volume of water contained in the system, you would need to flush 18.2 gallons x 2 = 36.4 gallons of water through the system.
Calculate the volume of waterTo calculate the volume of water contained in the system, you would use the formula for the volume of a cylinder: V = πr^2h, where r is the radius of the pipe (half the diameter), h is the length of the pipe, and π is approximately 3.14.
In this case, the radius of the pipe is 2 inches / 2 = 1 inch, and the length of the pipe is 1/4 mile = 1320 feet (since there are 5280 feet in a mile).So the volume of the pipe is: V = πr^2h = 3.14 x (1 inch)^2 x 1320 feet = 4201.6 cubic inches.Since there are 231 cubic inches in a gallon, the number of gallons of water in the pipe is: 4201.6 cubic inches / 231 cubic inches/gallon = 18.2 gallons.To flush twice the volume of water contained in the system, you would need to flush 18.2 gallons x 2 = 36.4 gallons of water through the system.Learn more about the volume of water here:
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s) x²-2xy; (Formula)
Factor out x from the expression
answer : x×(x-2y)
In circle T with m \angle STU= 94m∠STU=94 and ST=17ST=17 units, find the length of arc SU. Round to the nearest hundredth.
The length of the arc SU is given by 1.63978 units.
What is the area and circumference of a circle?The circumference (or) perimeter of a circle = 2πr units. The area of a circle = πr2 square units. Where r is the radius of the circle. The circumference of the circle or the perimeter of the circle is the measurement of the boundary of the circle. Whereas the area of the circle defines the region occupied by the circle.
Given here: The angle ∠STU=94 and ST=17
Thus ST forms the radius of the circle.
Now we know the angle subtended by the arc is given by
SU=2πr×94°/360
=2×3.14×0.2611
=1.63978 units
Hence, The length of the arc SU is given by 1.63978 units.
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Find the measure of each angle indicated.
Answer:
The answer is
[tex]48[/tex]
Step-by-step explanation:
Greetings!!
N.B
Theorem 1: Angle sum property of triangle states that the sum of interior angles of a triangle is 180°.
Thus,
[tex]50 + 82 + x = 180 \\ 132 + z= 180 \\x = 180 - 13 \\ x = 48[/tex]
Hope it helps!!!
A house on the market was valued at $274,000. After several years, the value decreased by 17%. By how much did the house's value decrease in dollars? What
is the current value of the house?
Answer:
The house's value decreased by $46580
The current value of the house is $227420
Step-by-step explanation:
How much did the house's value decrease in dollars?
17% = 0.17
$274,000 x 0.17 = $46580
So, the house's value decreased by $46580
What is the current value of the house?
$274,000 - $46580 = $227420
So, the current value of the house is $227420
A sofa is on sale for 60% off. The sale price is $184.
What is the regular price?
Answer:
$460
Step-by-step explanation:
Let the regular price of the sofa be $PWe are given that the sales discount is 60% Convert 60% to decimal => 60/100 = 0.6So discount in $ terms = P x 0.60 = 0.6PSale price = Regular price - Discount = P(1 - 0.6P) = P(0.4) = 0.4PTherefore the regular price of the sofa is $460
Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar.
Consider figures 1 and 2 shown on the coordinate plane. Figure 1 has been transformed to produce figure 2.
Describe the transformation.
This transformation can be described by (x' , y') = (
Considering the attached image. This transformation can be described by (x' , y') = (x' -y')
What is transformation in geometry?Transformation refers to movements objects make especially as described on a coordinate plane
A point, line, or geometric figure can be transformed in one of four ways, each of which affects the shape and/or location of the object. the four ways include
rotationdilationreflectiontranslationPre-Image refers to the object's initial shape, and Image, after transformation, refers to the object's ultimate shape and location.
Examining the preimage and the image of the attached picture show that the translation involved is reflection
And the transformation rule for reflection over y axis is
(x, y) → (x, -y)
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An iceberg is situated off the coast of Newfoundland at map coordinates (40,10). A cruise ship is
travelling along the line y=x+40 past the iceberg. Assuming that the cruise ship stays on
course and the iceberg does not drift, how close will the ship get to the iceberg?
The cruise ship will be 70 units (could be nautical miles, kilometers or any other unit) away from the iceberg.
What is the slope intercept?
The slope-intercept form of a linear equation is y = mx + b, where x and y are the coordinates of a point on the line, m is the slope of the line (the steepness of the line), and b is the y-intercept (the point where the line crosses the y-axis).
To determine how close the cruise ship will get to the iceberg, we need to find the point of intersection between the ship's path (y = x + 40) and the location of the iceberg (x = 40, y = 10).
Substituting x = 40 into y = x + 40, we get:
y = 40 + 40
y = 80
So the point of intersection is at (40, 80).
We can then use the distance formula to find the distance between the point of intersection and the location of the iceberg:
d = √((40 - 40)^2 + (80 - 10)^2)
d = √((0)^2 + (70)^2)
d = 70
So the cruise ship will be 70 units (could be nautical miles, kilometers or any other unit) away from the iceberg.
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Derek wants to withdraw $10,418. 00 from his account 3. 00 years from today and $12,440. 00 from his account 13. 00
years from today. He currently has $2,040. 00 in the account. How much must he deposit each year for the next 13. 0
years? Assume a 6. 05% interest rate. His account must equal zero by year 13. 0 but may be negative prior to that.
As per the concept of compounding interest, the amount he deposited on each year is $471.55
Compounding interest in math is the term defined as the interest on a deposit calculated based on both the initial principal and the accumulated interest from previous periods.
Here we know that the final amount is 12,400.00 and the time period is 13 years and interest rate is 6.05%.
Here we have identified that the compounding frequency is monthly basis.
Then the amount is calculated by using the compound interest formula
A = P(1 + r/n)ⁿˣ
Here we have to convert R as a percent to r as a decimal
r = R/100
r = 6.05/100
r = 0.0605 per year,
Now we have to solve the equation for P
P = A / (1 + r/n)ⁿˣ
P = 12,400.00 / (1 + 0.0605/12)⁽¹²ˣ¹³⁾
P = 12,400.00 / (1 + 0.0050416666666667)¹⁵⁶
P = $5,658.58
Here we know that the principal amount for one year for each month the amount is calculated as,
=> 5,658.58/12 = 471.55
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Each graph represents a relation. Determine if the relation is a function. Then find the domain
and range.
For the given graphs, 3) graph represents a function.
Despite the fact that the offered collection of points does in fact depict a relation (since xs and ys are connected), the set they provided me with has two points with the same x-value: (2, 3) and (2, 3). This relation cannot be a function because x = 2 offers me two possible destinations, or two possible y-values.
The only thing I have to do to determine whether the relation they have given me is a set of points is to look at the points' x-values; if any x appears more than once, the relation is not a function.
As, there exist an image for all the elements of the given graph and there exist unique pre-image for the range.
Domain = [-6, 6]
Range = [-3, 3]
For the second graph, the image for every co-domain is 4. So, it is not a function.
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Liam left his house and drove to the store. He stopped and went inside. From there, he drove in the same direction until he got to the bank. He stopped and went inside the bank. Then he drove home. The graph below shows the number of blocks away from home Liam is x minutes after he left his house, until he got back home.
Note that after 15 minutes, Liam is 25 blocks away from his house. This prompt is a distance - time graph problem.
What is a distance - time graph?A distance-time graph depicts how far an object has moved in a given amount of time. It is a basic line graph that depicts distance versus time findings. The Y-axis represents distance. The X-axis represents time.
It should be noted that a distance-time graph depicts how the distance and speed of an item vary over time. The movement of three items over time is depicted in this graph. The slope, or steepness, of each line shows the speed of the item. In general, the quicker the item, the steeper the slope.
Note that by the 13th minute, Liam had already covered 25 blocks but remained stationary at that location for 3 minutes.
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an algebra test is worth 100 points and has 25 questions. there are multiple choice questions worth 3 points each and short answers worth 8 points each. how many short answer questions are on the test?
There are 5 short answer questions on the test.
Algebra is a common thread that runs through practically all of mathematics. It involves the study of variables and the rules for manipulating them in formulas.
let us assume,
x = the number of multiple choice questions worth 3 points each
y = the number of short answer questions worth 8 points each
since the test has total of 25 questions we have
x + y = 25
the algebra test is worth 100 points
3×x + 8×y = 100
by solving the system of equations
x + y = 25
3×x + 8×y = 100
we find
x = 20
y = 5
there are 5 short answer questions on the test.
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in 1980 the average price of a home in brainerd county was $97,000. by 1986 the average price of a home was $109,000. write a linear model for the price of a home, p, in brainerd county as a function of the year, t. let t
The linear model for the price of a home P=2,000t+97,000
if 1980 -> t=0 then, 1986 -> t=6 (six years later).
The two points are (t, price) -> (0,97000) and (6,109000)
we want an equation in the form y=mx+b,
the y-intercept(b) is the y=p value when x =tis 0: so b=
m is the slope: m={{y2-y1}/{x2-x1}}={{t2 - t1}/{P2 - P1}}
given two points
(t, P) = (0, 97k) and (6, 109k)
slope = (97 - 109)/(0 - 6)=2
P - 97 = 2(t - 0) < point-slope form
P = 2t + 97 < in thousands
P = 2,000t + 97,000
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a phlebotomist draws the blood of a random sample would this data be considered qualitative or quanitative
This data will be considered as Qualitative sample.
Qualitative data is the data that is not represented by numbers, On the other hand, the quantitative data is represented by numbers and it is classified as discrete and continuous.
Qualitative sample
In qualitative research, only a sample of a population is selected for any given study. The study's research objectives and the characteristics of the study population determine which and how many people to select.
Quantitative sample
The quantitative research sampling method is the process of selecting representable units from a large population. Quantitative research refers to the analysis wherein mathematical, statistical, or computational method is used for studying the measurable or quantifiable dataset.
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Which mechanic will charge less for a 50-hour repair?
The mechanic that would charge less for a 50-hour repair is Mechanic A.
What is the point-slope form?Mathematically, the point-slope form of any straight line can be modeled by using this mathematical expression:
y - y₁ = m(x - x₁) or y - y₁ = (y₂ - y₁)/(x₂ - x₁)(x - x₁)
Where:
m represents the slope.x and y represents the points.For the table for Mechanic B, an equation which represent its data points is given by:
y - y₁ = (y₂ - y₁)/(x₂ - x₁)(x - x₁)
y - 300 = (600 - 300)/(20 - 10)(x - 10)
y - 300 = 300/10(x - 10)
y = 30x - 300 + 300
y = 30x.
When x = 50 hours, the charges for Mechanic A is given by:
y = 25x + 100
y = 25(50) + 100
y = $1,350
When x = 50 hours, the charges for Mechanic B is given by:
y = 30x
y = 30(50)
y = $1,500
In conclusion, we can logically deduce that Mechanic B charges a higher fee than Mechanic A.
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Find the values of x and y in the diagram, below
(4x-7)(7x-1) (9x+4)
Applying the corresponding angles theorem, the values of x and y are:
x = 13
y = 24
What is the Corresponding Angles Theorem?The Corresponding Angles Theorem states that if two lines are cut by a transversal and the pairs of corresponding angles are congruent, then the two lines are parallel.
From the diagram given, we have:
63 + (5x - 8) + (7x - 31) = 180 [corresponding angles theorem]
63 + 5x - 8 + 7x - 31 = 180
12x + 24 = 180
12x = 180 - 24
12x = 156
x = 13
5x - 8 + 4y + 27 = 180
Plug in the value of x:
5(13) - 8 + 4y + 27 = 180
65 - 8 + 4y + 27 = 180
84 + 4y = 180
4y = 180 - 84
4y = 96
4y/4 = 96/4
y = 24
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1. Consider the surface area of the following pyramid. (a) Calculate the total surface area of the pyramid. Show your work. (b) Calculate the lateral surface area of the pyramid. Show your work. Answer:
(a) The Total Surface Area of a pyramid = (1/2) × Base Perimeter × Slant Height + Base area
(b) The Lateral Surface Area of a pyramid = (1/2) × Base Perimeter × Slant Height
A pyramid's surface area is a measurement of the entire area occupied by all of its faces. Check out the pyramid shown below to view all of its faces as well as its peak, altitude, slant height, and base.
The whole area of a pyramid's faces makes up its surface area. There are two different types of surface areas in a pyramid: the total surface area(TSA) and the lateral surface area (LSA).
(a) The total surface area of the pyramid is measured as:
The Total Surface Area of a pyramid = lateral surface area of pyramid + Base area
The Total Surface Area of a pyramid = (1/2) × Base Perimeter × Slant Height + Base area
(b) The lateral surface area of the pyramid is measured as:
The Lateral Surface Area of a pyramid = The total area of the pyramid's side faces (triangles)
The Lateral Surface Area of a pyramid = (1/2) × Base Perimeter × Slant Height
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Select ALL of the expressions that are equivalent to
3. 5 - (4. 7).
(Select all that apply. )
4. 7 - (3. 5)
-4. 7 + 3. 5
3. 5 +4. 7
3. 5 - (-4. 7)
3. 5+ (-4. 7)
The All the expressions that are equivalent to "3.5 - (4.7)" are (b) -4.7 + 3.5 and (e) 3.5+ (-4.7) .
to find the equivalent expressions , we solve the expressions :
the main expression is 3.5 - (4.7) = -1.2 ;
Simplifying the expressions :
(a) 4.7 - (3.5) = 1.2 False
(b) -4.7 + 3.5 = -1.2 True
(c) 3.5 + 4.7 = 8.2 False
(d) 3.5 - (-4.7) = 3.5 + 4.7 = 8.2 False
(e) 3.5 +(-4.7) = 3.5 - 4.7 = -1.2 True
So , the only value of the expressions that matches with the main expressions are (b) -4.7 + 3.5 and (e) 3.5+ (-4.7) .
The given question is incomplete , the complete question is
Select ALL of the expressions that are equivalent to "3. 5 - (4. 7)"
(Select all that apply. )
(a) 4.7 - (3.5)
(b) -4.7 + 3.5
(c) 3.5 +4.7
(d) 3.5 - (-4.7)
(e) 3.5 + (-4.7)
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A total of 362 adults and children are at a theatre. There are 140 more adults than children. If x represents the number of adults and y represents the number of children, which system of equations could be used to find the number of adults and the number of children in the theatre?
A system of equations that could be used to find the number of adults and the number of children in the theatre is:
x + y = 362
y = x + 140
How to write the required system of linear equations?In order to write a system of linear equations to describe this situation, we would assign variables to the number of adults and number of cats respectively, and then translate the word problem into algebraic equation as follows:
Let the variable x represent the number of adults.Let the variable y represent the number of children.Since the total number of adults and children at this theatre is 362, a linear equation which represents this situation is given by;
x + y = 362
Additionally, there are 140 more adults than children;
y = x + 140
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adams awesome pawnshop will lend up to 42% of the value of a borrowers collateral. andy want wants to use his 10000 signed michael jordan rookie card. his 3000 signed joe monntana cleats & his 2000 signed tiger woods golf ball as collateral for a loan. with the loan andy wants to buy a signed michael jackson white glove that costs 6500. will the loan be enough for andy to get the glove?
No, Andy do not have enough loan, he need $200 more dollars to purchase Michael Jackson white glove.
What is percentage?Percentage is defined as a given part or amount in every hundred. It is a fraction with 100 as the denominator and is represented by the symbol "%".
Given that, Adams awesome pawnshop will lend up to 42% of the value of a borrowers collateral.
Andy want wants to use his $10000 signed Michael Jordan Rookie card. his $3000 signed Joe Montana cleats and his $2000 signed Tiger Woods golf ball as collateral for a loan.
Now, 42% of (10000+3000+2000)
= 42/100 ×15000
= 0.42×15000
= $6300
Cost of Michael Jackson white glove costs $6500
No, Andy do not have enough loan, he need $200 more dollars to purchase Michael Jackson white glove.
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The Stock Market Nadia is a stockbroker. She earns 14% commission each week. Last week, she sold $5,300 worth of stocks. How much did she make last week in commission? If she averages that same amount each week, how much did she make in commission in 2011?
Answer:$742; $38,584
Step-by-step explanation: 14% of $5,300 is $742 (0.14 x 5300). There are 52 weeks in a year so $742 x 52 weeks = $38,584.
how do i graph y<6, dont understand it at allllllll
Answer: Image attached below
Simply draw a dashed line at 6 and shade below the line
Inequalities are relationships between numbers or expressions that show whether a value is greater, less, or equal to another value.
Graph of y = 6
The first step of graphing any inequality is to graph it as though it were an equation. So, first graph the line y = 6. This line is a horizontal line at the y-value 6.
Then, go back to the inequality. The inequality states that y is less than 6. Since there is no "or equal to" sign, the line should be dotted. If there were an "or equal to" sign, then the line should have been solid. This is because the solutions to the inequality do not include 6.
Shading
Whenever you graph an inequality, the portion of the graph that satisfies the inequality should be shaded. In this case, the inequality is looking for all y-values less than 6. So, the portion of the graph under the line should be shaded in.
The heights of a species of plant are approximately Normally distributed, have a mean of 9. 31 cm, and have a standard deviation of 0. 55 cm. If 20 of the plants are randomly selected, what is the probability that the mean plant height is less than 9. 5 cm?
If heights of a species of plant are approximately Normally distributed, have a mean of 9.31 cm, and standard deviation of 0.55 cm , If 20 of the plants are randomly selected , then the probability that the mean plant height is less than 9.5 cm is 0.9388 .
We can use the Z-score formula to find the probability that a randomly selected plant has a height less than 9.5 cm:
Z = (x - mean)/(standard deviation/sqrt(sample size)) ;
Where x is the value we want to find the probability for, in this case x = 9.5
So , Z = (9.5 - 9.31)/(0.55/√20) = (0.19)/(0.123) = 1.54
Now we can use the standard normal table to find the probability that a Z-score is less than 1.54 .
From the z table ; we get , the p value is 0.9388 .
Therefore , The probability that a randomly selected plant from this species has a height less than 9.5 cm is about 0.9388 .
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When Damian runs the 400 meter dash, his finishing times are normally distributed
with a mean of 60 seconds and a standard deviation of 1 second. Using the empirical
rule, determine the interval of times that represents the middle 99. 7% of his finishing
times in the 400 meter race.
The interval of times that represents the middle 99. 7% of his finishing
times in the 400 meter race = (57, 63)
We know that the empirical rule or 68-95-99.7 rule states that for a normal distribution, 68% of observations falls within the first standard deviation (µ ± σ), 95% within the first two standard deviations (µ ± 2σ), and 99.7% within the first three standard deviations (µ ± 3σ).
Here, mean (μ) = 60 seconds, standard deviation (σ) = 1 second
To determine the interval of times that represents the middle 99. 7% of his finishing times in the 400 meter race.
the 99.7% are within three standard deviations would be,
μ ± 3σ
= (60 - 3(1), 60 + 3(1))
= (57, 63)
The required interval is: (57, 63)
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Quadrilateral QRST is a kite. What is TU?
The value of PR when the Pythagorean formula is used would be = 33.
What is a kite?A kite is a type of quadrilateral that has 2 pairs of equal-length sides and these sides are adjacent to each other.
The value of PR can be determined with the use of the Pythagorean formula = c² = a² +b²
where c = 65
a = 56
b = PR = X
b = c² - a²
b² = 65² - 56 ²
b² = 4225 - 3136
b² = 1089
b= √ 1089
b = 33.
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Complete question:
Quadrilateral QRST is a kite. What is PR?
a particular person's height oscillates throughout the day with a period of 24 hours. their average height is 170 cm, and their maximum height is 173 cm. at 4 am, their height is 170 cm and increasing. (a) find a possible formula for h(t), their height (in cm) t hours after midnight. (b) find a time when their height equals 169 cm.
The time when h(t) = 169 is 4.13am.
For (a), one possible formula for h(t) is the sinusoidal function, h(t) = Asin(Bt + C) + D, where A is the amplitude (maximum height - minimum height), B is the angular frequency (2 pi/period), C is the phase (starting point), and D is the minimum height. In this case, A = 3, B = 2pi/24, C = 0, and D = 170. Therefore, the formula for h(t) is h(t) = 3sin(2pit/24) + 170.
For (b), we need to solve for t when h(t) = 169. We can rearrange the equation to 3sin(2pit/24) = -1 and solve for t. Using a calculator, we can find that t = 8.21 hours. As 8.21 hours after midnight is 4.13am, the time when h(t) = 169 is 4.13am.
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Please help me! I need the slope
Answer:
-1.5 or 1 1/2
Step-by-step explanation:
from the graph you see on Y-axis when Y =2, x=0. so you got a point: (0,2)
then on the right lower quadrant, when x = 2, y = -1, another point (2,-1)
slope = (y2 -y1)/(x2-x1) = [2-(-1)] / (0-2) =-1.5
the way the slope's direction is, you know the slope must be negative.