Alice was sitting on a dock looking at a lake. She picked up a stone and threw it in the air and out toward the lake. It seemed like it was in the air for a long time. The equation that can be used to model the height of the stone (in feet) as it relates to the time in the air (in seconds) is given by h(t)=5+50t-16t^2. In order to solve for how long the stone was in the air, Alice will need to use the quadratic equation. How long was the stone in the air? Round to the nearest hundredth if not an exact answer.

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!

a long term investor

step-by-step explanation:

because he is a long term investor

your answer is 125y5

the argument of alfred t. mahan, henry cabot lodge, and albert j. beveridge was the economically and mass production the the americans could not consume themselves. this led expansion to sell to other foreign nations for profits.

step-by-step explanation:

this is my explanation