A hiker stands on a small hill and tosses a stone. The stone then follows a path with height h above the ground at time t. The function h(t) = - 16t2 + 16x + 32 models the stone's path. How long does it take the stone to reach its maximum height?

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

ion

step-by-step explanation:

ion ion ion ion ion ion ion ion ion ion ion

its 50 miles away from the starting point