The radius, r, of a sphere is increasing at 0.03 meters per second. the rate of increase is constant.

a. what is the rate of increase in its volume when the radius of the sphere is 18 meters?

b. what is the rate of increase in the sphere’s surface area when the volume is 288 cubic meters?

c. express the rate at which the volume of the sphere changes with respect to the surface area of the sphere (as a function of r).

, i don't get any of this. an explanation would be great, !

Asmall (but heavy) particle placed in a glass of water will follow a zigzag motion because the particle will bounce off of the water molecules it meets. this is called brownian motion. a physicist simulates this on a computer, by varying the distance a particle can travel (called the mean free length), on average, before it collides with a water molecule and assigning the change in motion to be one of 8 directions, each with a similar probability. by running the simulated particle (with the same mean free length) many times she determines that it should take 15 seconds, on average, for the particle to fall to the bottom, with a standard deviation of 1.5 seconds. next she lets a real particle fall through a glass of water and finds that it took 18 seconds. what does she conclude, and why?

What is the order of these fractions from least to greatest 2/3 7/10 5/8 65/100

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?