Astone is dropped into some water and a circle of radius r is formed and slowly expands. the perimeter of the circle is increasing at 3 m/ s. at the moment the radius is exactly 2m, what rate is the radius of the circle increasing?

Can anyone me with 32,33,36,37,and 40.

10 ! in a race, nick is 50 feet in front of jay after ten seconds. how fast can nick run, if jay can run 20 feet per second?

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.