Me, i don't understand how to do this. solve v = 1 3 πr2h for h. a) 3v πr2 b) v 3πr2 c) r sqrt 3v π d) v - 1/3 πr2

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?