Bla bla

We can solve this equation, Solveit

30(3/5)^N  =  4      where N is the number of bounces.....  divide both sides by 30

(3/5)^N  = 4/30

(.6)^N  = 2/15    take the log of each side

log (.6)^N  = log (2/15)     and we can write

N log(.6) = log(2/15)     divide both sides by log(.6)

N = log(2/15) / log(.6)

N  ≈ 3.944    

When N = 3.....the ball height = 6.48 ft

When N = 4.......the ball height = 3.88 ft

So......it looks like that on the 4th bounce, the ball will be at a height of less than 4 ft   (B)

My guess is( B), because (3/5)^4 X 30 feet=3.888 feet after the 4th bounce.

I just didn t  understand the question but now i understood thanks CPhill and Guest ! :)