A factor of n is a number which when multiplied by another number gives us the number n. The correct option is B, 2.
What is a factor?A factor of n is a number which when multiplied by another number gives us the number n.
For the result of ∛(144/y) to be a whole number the value of 144/y should be a perfect cube.
Since the factors of 144 are 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, and 144. Also, the numbers that are a perfect cube under 144 are 1,8,27,64, and 125.
Now, divide 144 by each factor to get see which results in a perfect cube.
144/1 = 144,
144/2 = 72,
144/3 = 48,
144/4 = 36,
144/6 = 24,
144/8 = 18,
144/9 = 16,
144/12 = 12,
144/16 = 9,
144/18 = 8 (Perfect Cube),
144/24 = 6,
144/36 = 4,
144/48 = 3,
144/72 = 2,
144/144 = 1 (Perfect Cube).
Hence, the correct option is B, 2.
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what is between fractions 6/6 and 6/7
The fraction 13/7 lies between the fractions 6/6 and 6/7.
We have,
Between the fractions 6/6 and 6/7, there are infinitely many fractions.
To find a fraction that lies between these two fractions, we can take their average.
The fraction 6/6 simplifies to 1, and the fraction 6/7 cannot be simplified further.
To find the average, we add the two fractions and divide the sum by 2:
(6/6 + 6/7) / 2
To add the fractions, we need a common denominator, which is the least common multiple (LCM) of 6 and 7, which is 42.
Converting the fractions to have a common denominator:
(6/6) x (7/7) + (6/7) x (6/6) / 2
Simplifying the expression:
(42/42 + 36/42) / 2
Combining the numerators:
(78/42) / 2
Dividing:
78/42 = 13/7
Thus,
The fraction 13/7 lies between the fractions 6/6 and 6/7.
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Solve for x. 6x-10≤8 or 1/3x+6>12 PLEASE HELP and show work
The value of x in 1st equation is x ≤ 3 i.e. x ∈ (-infinity,3] and the value of x in 2nd equation is x > 18 i.e. x ∈ (18,infinity)
Given two equations 1)6x-10<8 and 2) \(\frac{x}{3}\)+6 > 12
Solving the above equations
1) 6x-10≤8
⇒6x ≤ 18
⇒X≤ 3
⇒x ≤ 3 i.e. x ∈ (-infinity,3]
2)\(\frac{x}{3}\)+6 > 12
⇒\(\frac{x}{3}\) > 6
⇒x>18
⇒ x > 18 i.e. x ∈ (18,infinity)
Therefore,The value of x in 1st equation is x ≤ 3 i.e. x ∈ (-infinity,3] and the value of x in 2nd equation is x > 18 i.e. x ∈ (18,infinity)
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The power goes out as Sandra is trying to get dressed. If she has 1 white T-shirts and 19 colored T-shirts in her drawer, is it likely that she will pick a colored T-shirt in the dark? What is the probability of Sandra picking a colored T-shirt? Complete the explanation to explain your answers. Enter the probability as a simplified fraction.
Answer:
yes it is likely. the chances of her getting a colored shirt is 95% or 19/20
PLEEEAAAAAASE HELP!
What is the answer to this question?
Answer:
23 unitsStep-by-step explanation:
Perimeter is the sum of side lengths
Let's find the sides first
AB = √(-2- 2)² + (-4+1)² = 5BC = (2 - (-1)) = 3CD = √(-1- 2)²+(5-2)² = √18 = 3√2 = 4.24DE = √(-4 -(-1))²+(2-5)²= √18 = 3√2 = 4.24AE = √(-4-(-2)²+(2-(-4))²=√40= 2√10 = 6.32Perimeter is
P = 5 + 3 + 4.24 + 4.24 + 6.32 = 22.8 ≈ 23 rounded to the nearest whole numberI need help with this question.. :')
The equation of the line passing through A and B is y = (4/5)x - (2/5).
What is the line example's equation?A straight line's general equation is y = mx + c, where m is the gradient and y = c is the value at which the line intersects the y-axis. The y-axis intercept is denoted by the number c. A straight line with gradient m and intercept c on the y-axis has the equation y = mx + c.
The point-slope form of a linear equation can be used to find the equation of the line passing through points A and B:
y - y1 = m(x - x1) (x - x1)
where m denotes the slope of the line, (x1, y1) denotes the coordinates of point A or B, and (x, y) denotes the coordinates of any other point on the line.
To calculate the slope, we can use points A (3, 2) and B (8, 6).
m = (y2 - y1) / (x2 - x1) = (6 - 2) / (8 - 3)\s= 4 / 5
So the equation for the line connecting A and B is:
y - 2 = (4/5)(x - 3) (x - 3)
This equation can be simplified by multiplying both sides by 5:
5y - 10 = 4x - 12
Then we can rearrange it to form the slope-intercept equation, y = mx + b:
5y = 4x - 2
y = (4/5)x - (2/5)
As a result, the equation for the line connecting A and B is y = (4/5)x - (2/5).
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Leah works at an appliance store. She recorded her recent sales.
washing machines 3
dishwashers 1
ovens 6
clothes dryers 5
What is the experimental probability that the next appliance Leah sells will be an oven?
6/15
you add everything she sells together. ( 3+1+6+5=15) Then you put the amount of ovens she sells above taht number, making it a fraction.
In the diagram, the measures of 23 and 27 are 45°. The measure of 25 is
135°. Are lines cand dparallel?
F
5
8
OA. Yes, because 23 and 27 are congruent.
OB. No, because 27 and 25 are not congruent.
C. Yes, because 25 and 27 are supplementary.
D. No, because 23 and 25 are not supplementary.
The correct answer is D. No because 23 and 25 are not supplementary.
In the given diagram, it is stated that the measures of angles 23 and 27 are 45°, and the measure of angle 25 is 135°. To determine if lines C and D are parallel, we need to analyze the angles formed by these lines.
If the alternate interior angles or corresponding angles are congruent, then the lines are parallel. However, in this case, we don't have enough information about the angles formed by lines C and D to make that determination.
The fact that angle 23 and angle 27 are congruent (both measuring 45°) doesn't provide any information about the relationship between lines C and D. Similarly, the measure of angle 25 being 135° doesn't give us any insight into the parallelism of lines C and D. Therefore, we cannot conclude that lines C and D are parallel based on the given information, and the correct answer is D.
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Which number line shows the solution of 5x-25>-15
The solution to the inequality 5x - 25 > -15 in inequality and interval notation form are x > 2 and (2,∞)
How to solve linear inequality problems?A linear inequality is simply an expression where two values are compared by the inequality symbols <, >, ≤ or ≥.
Given the data in the question;
5x - 25 > -15
To solve for x, bring all terms containing the variable to the left side of the equation and the terms without variables to the right side of the equation.
5x - 25 > -15
Add 25 to both sides
5x - 25 + 25 > -15 + 25
5x > -15 + 25
5x > 10
Divide each term in 5x > 10 by 5 and simplify.
5x > 10
5x/5 > 10/5
x > 2
Therefore, the solution to inequality is x > 2.
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tayshawn saw the following sign in a butcher shop. if he buys one each item, how much will he spend ? use mental math to help find your answer. SALE - ROAST -$7.19 BREAD $1.56 MILK $2.81 YOGURT $0.44
Answer:
He will spend $12.00
Explanation:
Given that he buys one of each item.
Then the amount spend is the sum of the price of all the items bought.
Given;
ROAST -$7.19
BREAD $1.56
MILK $2.81
YOGURT $0.44
Therefore, the total amount spent is;
\(\begin{gathered} =\text{ \$7.19+\$1.56+\$2.81+\$0.44} \\ =\text{ \$12.00} \end{gathered}\)He will spend $12.00
Simplify the expression:
2+1d+3a=4
Answer:
d=2-3a
Step-by-step explanation:
Solve for d by simplifying both sides of the equation, then isolating the variable.
3d+3a=4
Subtract 3 from each side of the equal sign:
d+3a=1
Subtract 3a-1:
d=2-3a
Hence d=2-3a is your final answer
Answer:
d = 2 - 3a
a = -d+2/3
Step-by-step explanation:
i didnt know which one u wanted to slove for but here are the answers and putting both equations would take to long so yea
lmk if this helped
2. Kirk is reading a science fiction novel. After his first 20 minutes of reading, he sees that he's read 32 pages of
the book. If the book is 375 pages long, which of the following is closest to the total time it will take him to
finish the book?
The total time that should be taken by him to finish the book is 3.9 hours.
Given that,
There are 20 minutes of reading for 32 pages of the book.Now there are 375 pages.Based on the above information, the time taken should be
\(= 375 \times 20 \div 32\)
= 234.375 minutes
Now in hours it should be
\(= 234.375 \div 60\)
= 3.9 hours
Therefore we can conclude that the total time that should be taken by him to finish the book is 3.9 hours.
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3 A piece of ibbon of lengh 84 cm is divided
into three pieces in the ratio 1:47. Calculate the
length of the longest pieces
?
Add the 3 ratio portions together: 1 + 4 + 7 = 12
Divide total length by 12:
84/12 = 7
Multiply each ratio portion by 7:
1 x 7 = 7
4 x 7 = 28
7 x 7 = 49
The longest piece is 49 cm
Answer:
49cm
Step-by-step explanation:
1x+4x+7x=84
12x=84
X=7
4*7=28
7*7=49
So we can see 49cm is the longest.
The maximum capacity on a school bus is 48 students . If there are 36 students on the bus , what percent of the bus is full ?
Answer:
75%
Step-by-step explanation:
75% of 3/4 of 48 is 36
Hope this helps :D
AnsWER
Step-by-step explanation:
is %## because ## happens ## be #### we #### to ###### so ## divided ## 36 ## %13
Two mechanics worked on a car. The first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. Together they charged $1650. What was the rate charged per hour by each mechanic if the sum of the two rates was $140 per hour?
Identify how the graph is shifted from that of the parent functionY=cot(x-3)
If triangles ABC and DEF are similar, what is y? Show your work.
The value of y is 18
What are similar triangles?Similar triangles have the same corresponding angle measures and proportional side lengths. The angles of the two triangle must be equal and it not necessary they have equal sides.
Therefore the corresponding angles of similar triangles are congruent and the ratio of corresponding sides of similar triangles are equal.
Therefore;
14/21 = 12/y
14y = 21 × 12
14y = 252
divide both sides by 14
y = 252/14
y = 18
Therefore the value of y is 18.
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question 2 answer the math
Answer:
G)
Step-by-step explanation:
3% of 8000 is 240
now multiply it by 4 (years) and you get 940
PLEAS ANSWER ASAP I WILL GIVE BRIAINLYIST
The coordinates of the vertices of a polygon are (-3, 1), (-3, 3), (-1, 5), (2, 4), and (2, 1).
What is the perimeter of the polygon to the nearest tenth of a unit?
A.16.0 units
B.17.2 units
C.15.4 units
D.18.8 units
The perimeter of the polygon, with the specified coordinate points , found using Pythagorean Theorem iis approximately 16 units
What is the Pythagorean Theorem?The Pythagorean Theorem indicates that the square of the distance between points on the coordinate plans is the sum of the square of the horizontal and vertical distances between the point.
The coordinates of the vertices of the polygon are;
(-3, 1), (-3, 3), (-1, 5), (2, 4), and (2, 1)
The length of the sides are therefore;
3 - 1 = 2,
√((-1 - (-3))² + (5 - 3)²) = 2·√2
√((2 - (-1))² + (4 - 5)²) = √(10)
4 - 1 = 3
2 - (-3) = 5
The perimeter is therefore;
2 + 2·√2 + √(10) + 3 + 5 ≈ 16
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Express the fact that x differs from 4 by less than 3/7 as an inequality involving absolute value. Solve for x What is the inequality? (Use integers or fractions for any numbers in the expression.)
If x differs from 4 by less than 3/7 as an inequality involving absolute value, then the solution of the inequality is 22/7 < x < 34/7
The statement is:
"x differs from 4 by less than 3/7"
The inequality relation will be
| x - 4 | < 3/7
This means that the distance between x and 4 on the number line is less than 3/7.
To solve for x, we can write two separate inequalities:
x - 4 < 3/7 and x - 4 > -3/7
Simplifying each inequality:
x < 4 + 3/7 and x > 4 - 3/7
Finding a common denominator:
x < 31/7 + 3/7 and x > 25/7 - 3/7
Simplifying:
x < 34/7 and x > 22/7
Therefore, the solution of the given inequality is 22/7 < x < 34/7
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Help me please.........
Answer:
i need a better picture reference to help you
Step-by-step explanation:
Write the factored form of the polynomial function with real coefficients, a lead coefficient of 1, and zeros of − 4 , − 4 , 1 , and 3 .
The factored form of the polynomial with the roots of 1,-4,-4, and 3 is (x + 4)(x - 1)(x - 3).
What is an algebraic factor?An algebraic factor is the multiplication of two algebraic terms.
That term could be in form of summation multiplication or in subtraction.
The root of the quadratic equation formed by the algebraic factor is always real.
If x = a,b,c are the roots of a polynomial then (x - a)(,(x - b) and (x - c) will be the factor of that polynomial.
Given that,
1,-4, and 3 are the roots of the polynomial.
Then (x - 1)(x + 4)(x - 3) will be the factor of that polynomial.
Hence "The factored form of the polynomial with the roots of 1,-4,-4, and 3 is (x + 4)(x - 1)(x - 3)".
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the diffrence of 54 and 32 mutlipted by the diffrence of 8 and 5
Answer:
66
Step-by-step explanation:
the difference of 54 and 32 is 54 - 32 = 22
the difference of 8 and 5 is 8 - 5 = 3
then
22 × 3 = 66
can someone help with this plz:)
Answer:
XI and IX
Line above has arrow heads on both ends.
Step-by-step explanation:
XI and IX
Line above has arrow heads on both ends.
9. At a movie theater, Ms. Torres purchased two boxes of popcorn and three soft drinks for $6.05. Mr. Russo purchased three boxes of popcorn and five soft drinks for $9.50. Assuming no tax, find the cost of a box of popcorn.solve for x and y
Let x and y represent the cost of one box of popcorn and one soft drink respectively.
Given;
Ms. Torres purchased two boxes of popcorn and three soft drinks for $6.05.
\(2x+3y=6.05\text{ -----1}\)Also, Mr. Russo purchased three boxes of popcorn and five soft drinks for $9.50.
\(3x+5y=9.50\text{ ------2}\)From the question we have generated a system of simultaneos equation.
we now need to solve the simultaneous equation to get the value of x and y.
Let's solve by elimination.
Firstly multiply equation 1 through by 3 and equation 2 by 2.
This is to have equal coefficient of x for the two equations, to make elimination possible.
\(\begin{gathered} 2x+3y=6.05\text{ -----1 }\times3 \\ 6x+9y=18.15\text{ ------3} \\ \\ 3x+5y=9.50\text{ ------2 }\times2 \\ 6x+10y=19.00---------4\text{ } \end{gathered}\)Now we have equation 3 and 4.
Let us subtract equation 3 from 4.
\(\begin{gathered} 6x+10y-6x-9y=19.00-18.15 \\ 6x-6x+10y-9y=0.85 \\ y=0.85 \end{gathered}\)We can now substitute the value of y into equation1 to get x
5. Use the FOIL method to solve for, (3x + 2) (2x +4)
Answer:
1 . (3x) (2x) = 6x²
2 . (3x) (4) = 12x
3 . (2) (2x) = 4x
4 . (2) (4) = 8
= 6x² + 12x + 4x + 8
Answer - 6x² + 16x + 8
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Mathematics word problem
75 miles per hour is the rate of train.
what is the formula of speed?Formula of speed = distance/time
let,
s1 , speed of A train = s
s2, Speed of B train = s
t1, time of travel for train A = 2.5h
t2, time of travel for train B = 4 h
d1, distance traveled by train A
distance travel by train A = speed*time
= s1*t1
d2, distance traveled by train B
distance travel by train A = speed*time
= s2*t2
Total distance between station A and station B = 562.5 mi
d1+d2=562.5 mi
s1t1+s2t2=562.5
s(2.5)+s(4)=562.5
6.5 s = 562.5
s = 562.5/6.5
s = 86.5 mph
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75 miles per hour is the rate of the train.
what is the rate of the train?Given:
Train A and Train B leave a central station at the same time.They travel at the same speed, but in opposite directions, with train A heading towards station A.Train B heading towards station B.Train A reaches station A after 2 and 1/2 hours.Train B reaches station B after 4 hours.Station A and Station B are 585 mi apart.Find:
Rate of the trains.Solution:
Formula of speed = distance/time
Let us consider
Speed of A train(s1) = s
Speed of B train(s2) = s
Time of travel for train A(t1) = 2.5h
Time of travel for train B(t2) = 4 h
Distance traveled by train A(d1)
= speed*time
= s1*t1
Distance traveled by train B(d2)
= speed*time
= s2*t2
The total distance between station A and station B = 562.5 mi
d1+d2=562.5 mi
s1t1+s2t2=562.5
s(2.5)+s(4)=562.5
6.5 s = 562.5
s = 562.5/6.5
s = 86.5 mph
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NO LINKS!! URGENT HELP PLEASE!!
1. Find the area of a regular octagon. Each side is 12 m.
2. The perimeter of a regular polygon is 72 feet. An exterior angle of the polygon measures 40°. Find the length of each side.
3. If the perimeter of a regular pentagon is 50 in. Find the area. Show a drawing and work please.
Answer:
1) 695.3 m²
2) 8 ft
3) 172.0 in²
Step-by-step explanation:
Question 1To find the area of a regular polygon, we can use the following formula:
\(\boxed{\begin{minipage}{5.5cm}\underline{Area of a regular polygon}\\\\$A=\dfrac{s^2n}{4 \tan\left(\dfrac{180^{\circ}}{n}\right)}$\\\\\\where:\\\phantom{ww}$\bullet$ $n$ is the number of sides.\\ \phantom{ww}$\bullet$ $s$ is the side length.\\\end{minipage}}\)
Given the polygon is an octagon, n = 8.
Given each side measures 12 m, s = 12.
Substitute the values of n and s into the formula for area and solve for A:
\(\implies A=\dfrac{(12)^2 \cdot 8}{4 \tan\left(\dfrac{180^{\circ}}{8}\right)}\)
\(\implies A=\dfrac{144 \cdot 8}{4 \tan\left(22.5^{\circ}\right)}\)
\(\implies A=\dfrac{1152}{4 \tan\left(22.5^{\circ}\right)}\)
\(\implies A=\dfrac{288}{\tan\left(22.5^{\circ}\right)}\)
\(\implies A=695.29350...\)
Therefore, the area of a regular octagon with side length 12 m is 695.3 m² rounded to the nearest tenth.
\(\hrulefill\)
Question 2The sum of an interior angle of a regular polygon and its corresponding exterior angle is always 180°.
If the exterior angle of a polygon measures 40°, then its interior angle measures 140°.
To determine the number of sides of the regular polygon given its interior angle, we can use this formula, where n is the number of sides:
\(\boxed{\textsf{Interior angle of a regular polygon} = \dfrac{180^{\circ}(n-2)}{n}}\)
Therefore:
\(\implies 140^{\circ}=\dfrac{180^{\circ}(n-2)}{n}\)
\(\implies 140^{\circ}n=180^{\circ}n - 360^{\circ}\)
\(\implies 40^{\circ}n=360^{\circ}\)
\(\implies n=\dfrac{360^{\circ}}{40^{\circ}}\)
\(\implies n=9\)
Therefore, the regular polygon has 9 sides.
To determine the length of each side, divide the given perimeter by the number of sides:
\(\implies \sf Side\;length=\dfrac{Perimeter}{\textsf{$n$}}\)
\(\implies \sf Side \;length=\dfrac{72}{9}\)
\(\implies \sf Side \;length=8\;ft\)
Therefore, the length of each side of the regular polygon is 8 ft.
\(\hrulefill\)
Question 3The area of a regular polygon can be calculated using the following formula:
\(\boxed{\begin{minipage}{5.5cm}\underline{Area of a regular polygon}\\\\$A=\dfrac{s^2n}{4 \tan\left(\dfrac{180^{\circ}}{n}\right)}$\\\\\\where:\\\phantom{ww}$\bullet$ $n$ is the number of sides.\\ \phantom{ww}$\bullet$ $s$ is the side length.\\\end{minipage}}\)
A regular pentagon has 5 sides, so n = 5.
If its perimeter is 50 inches, then the length of one side is 10 inches, so s = 10.
Substitute the values of s and n into the formula and solve for A:
\(\implies A=\dfrac{(10)^2 \cdot 5}{4 \tan\left(\dfrac{180^{\circ}}{5}\right)}\)
\(\implies A=\dfrac{100 \cdot 5}{4 \tan\left(36^{\circ}\right)}\)
\(\implies A=\dfrac{500}{4 \tan\left(36^{\circ}\right)}\)
\(\implies A=\dfrac{125}{\tan\left(36^{\circ}\right)}\)
\(\implies A=172.047740...\)
Therefore, the area of a regular pentagon with perimeter 50 inches is 172.0 in² rounded to the nearest tenth.
Answer:
1.695.29 m^2
2.8 feet
3. 172.0477 in^2
Step-by-step explanation:
1. The area of a regular octagon can be found using the formula:
\(\boxed{\bold{Area = 2a^2(1 + \sqrt{2})}}\)
where a is the length of one side of the octagon.
In this case, a = 12 m, so the area is:
\(\bold{Area = 2(12 m)^2(1 + \sqrt{2}) = 288m^2(1 + \sqrt2)=695.29 m^2}\)
Therefore, the Area of a regular octagon is 695.29 m^2
2.
The formula for the exterior angle of a regular polygon is:
\(\boxed{\bold{Exterior \:angle = \frac{360^o}{n}}}\)
where n is the number of sides in the polygon.
In this case, the exterior angle is 40°, so we can set up the following equation:
\(\bold{40^o=\frac{ 360^0 }{n}}\)
\(n=\frac{360}{40}=9\)
Therefore, the polygon has n=9 sides.
Perimeter=72ft.
We have
\(\boxed{\bold{Perimeter = n*s}}\)
where n is the number of sides in the polygon and s is the length of one side.
Substituting Value.
72 feet = 9*s
\(\bold{s =\frac{ 72 \:feet }{ 9}}\)
s = 8 feet
Therefore, the length of each side of the polygon is 8 feet.
3.
Solution:
A regular pentagon has five sides of equal length. If the perimeter of the pentagon is 50 in, then each side has a length = \(\bold{\frac{perimeter}{n}=\frac{50}{5 }= 10 in.}\)
The area of a regular pentagon can be found using the following formula:
\(\boxed{\bold{Area = \frac{1}{4}\sqrt{5(5+2\sqrt{5})} *s^2}}\)
where s is the length of one side of the Pentagon.
In this case, s = 10 in, so the area is:
\(\bold{Area= \frac{1}{4}\sqrt{5(5+2\sqrt{5})} *10^2=172.0477 in^2}\)
Drawing: Attachment
Use a net to find the surface area of the cereal box
Answer:
206
Step-by-step explanation:
A=2(wl+hl+hw)
What is F(-x)?
F(x)=x^3+1
Answer:
F(-x) = 0
Step-by-step explanation:
What is F(-x)?
F(-x) = F(-1)
F(x) = x³ + 1 F(-1)
F(-1) = -1³ + 1
F(-1) = -1 + 1
F(-1) = 0
So, F(-x) = 0
Answer:
f(-1) = 0
Step-by-step explanation:
Evaluating a function for f(-x) is the same as evaluating it for f(-1).
So we plug in -1 instead.
f(-1) = x³ + 1
= (-1)³ + 1 (here we cube -1)
= -1 + 1 (here we subtract)
= 0 (and, this is the answer)
\(\therefore\) The answer is f(-1) = 0
It appears that people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, minutes of activity varied according to the N(373, 61) distribution. Minutes of activity for lean people had the N(525, 104) distribution. Within what limits do the active minutes for 95% of the people in each group fall
Answer:
Among mildly obese people, 95% of the people have between 251 and 495 minutes of activity per day.
Among lean people, 95% of the people have between 317 and 733 minutes of activity per day.
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
Within what limits do the active minutes for 95% of the people in each group fall
By the Empirical Rule, within 2 standard deviations of the mean.
Mildly obese:
Mean = 373, standard deviation = 61.
373 - 2*61 = 251 minutes
373 + 2*61 = 495 minutes
Among mildly obese people, 95% of the people have between 251 and 495 minutes of activity per day.
Lean people:
Mean = 525, standard deviation = 104
525 - 2*104 = 317 minutes
525 + 2*104 = 733 minutes
Among lean people, 95% of the people have between 317 and 733 minutes of activity per day.