I need help with number 9.
simple algebra.

C 1099

Step-by-step explanation:

The volume of a cylinder is given by

V = pi * r^2 *h

We know the radius is 5 and the height is 14

Substitute in what we know

V = 3.14 * 5^2 *14

V = 3.14 *25*14

V =1099  in^3

The answer is B

you may try to draw a picture to work out the question

The question require the knowledge of Pythagorean Theorem

Sara walked up 4miles per miles for 2hours .Therefore ,she walked 8miles in total.

her sister walked to the right 3miles per hours for 2hours.Therefore ,she walked 6miles in total .

the distance is
6^2+8^2=x^2
x=10
therefore the answer is B