A egg is dropped from the roof of a building. the distance it falls varies directly with square of the time it falls. if it takes 1/2 second for the egg to fall eight feet, how long will it take the egg to fall 200 feet?

Answer

12.5 seconds

Step-by-step explanation:

Find the time it takes the egg to travel in 1 second

1/2 second=8 feet

x 2                x 2

1 second=16 feet

Create a proportion:

(x represents time in this equation)

16 feet :1 second=200 feet: x seconds

-solve with cross products

x=12.5

the line of

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!