Ryan is building a ramp so he can easily move things in and out of an overhead storage area in his garage. the storage area is 8 feet off the ground, and ryan has 15 feet of space along the ground to build the ramp. the length of ramp what is the length of the ramp ryan will build? 7 feet 10 feet 17 feet 23 feet

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Math it's appreciated. (picture provided)

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent