SOLUTION: A light shines toward the ground from the top of a building wall that is 40 ft high. A kid in a tree house that is 25ft to the right of the building drops an apple from the same h

Question 1153645: A light shines toward the ground from the top of a building wall that is 40 ft
high. A kid in a tree house that is 25ft to the right of the building drops an apple from the same height (40 ft). How fast is the shadow of the apple moving along the ground ½ sec later? Assume the apple falls at a distance 𝑠 = 16𝑡^2 in t seconds.
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
first draw it:

given:
a building wall that is high
a tree house that is to the right of the building
the shadow of the apple moving along the ground sec later
in seconds
two right triangles are similar, means corresponding sides are proportional
so,

....multiply by

Differentiating with respect to we have

We are given ⇒
At , and .

Plugging these in we have

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