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3 years ago

Assuming part a is correct, how do you do b and c?

Mathematics

1 answer:

zubka84 [21]3 years ago

8 0

Step-by-step explanation:

B. Yes, we are 99% confident that the population mean is within the interval.

C. Yes, 225 is below the interval minimum, so it is reasonable to conclude the average cholesterol level is greater than 225 mg/dl.

D. No. Increasing the sample size would decrease the margin of error, so the ends of the interval would move closer to the sample mean of 251.9. So the interval minimum would still be higher than 225.

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Given f(x) = 18x + 8, find x when f(x)= 14.

Naddika [18.5K]

The answer is 0.3 (1/3.)

Proof?

f(0.3) = 18(0.3) + 8

f(0.3) = 6 + 8

f(0.3) = 14

14 = 14

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✉️ If any further questions, inbox me! ✉️

8 0

2 years ago

Blue

erik [133]

Answer:

30%

Step-by-step explanation:

3+4+6+7= 20

6 (green) / 20

= 30%

6 0

2 years ago

In the figure above, square ABCD and triangle EFG have the same areas. If AB =6 and EG =8, what is the height o triangle EFG?

lawyer [7]

Answer:

The height of triangle EFG is 9 units

Step-by-step explanation:

see the attached figure to better understand the problem

step 1

Find the area of a square ABCD

The area of a square is equal to

$A=b^2$

where

b is the length side of the square

we have

$b=AB=6\ units$

substitute

$A=6^2=36\ units^2$

step 2

Find the height of triangle EFG

The area of triangle EFG is equal to

$A=\frac{1}{2}(b)(h)$

where

b is the base of triangle

h is the height of triangle

we have

$b=EG=8\ units$

$A=36\ units^2$ ---> area of triangle EFG is the same that the area of square ABCD

substitute the given values in the formula

$36=\frac{1}{2}(8)(h)$

solve for h

$36=4h\\h=9\ units$

therefore

The height of triangle EFG is 9 units

3 0

3 years ago

The measure of each interior angle of a regular polygon is eleven times that of an exterior angle how many sides does the polygo

Nuetrik [128]

Let there be x sides.
180(x-2)/x=11*360/x
180(x-2)=11*360
x-2=11*2
x-2=22
x=24

the polygon has 24 sides.

8 0

3 years ago

Read 2 more answers

A plane can fly 290 miles downwind in the same amount of time as it can travel 220 miles upwind. Find the velocity of the wind i

nikitadnepr [17]

Answer:

The speed of the wind is $35\ mph$

Step-by-step explanation:

Let

x-----> the speed of the wind in mph

we know that

Downwind

$(255+x)=\frac{290}{t}$

$t=\frac{290}{(255+x)}$ -----> equation A

Upwind

$(255-x)=\frac{220}{t}$

$t=\frac{220}{(255-x)}$ ----> equation B

equate the equation A and the equation B

$\frac{290}{(255+x)}=\frac{220}{(255-x)}\\ \\290(255-x)=220(255+x)\\ \\ 73,950-290x= 56,100x+220x\\ \\220x+290x=73,950-56,100\\ \\510x=17,850\\ \\x= 35\ mph$

7 0

3 years ago