Charlie, who is 4 feet tall, walks away from a streetlight that is 16 feet high at a rate of 4 feet per second, as shown in the figure. Express the length s of Charlie's shadow as a function of time. (Hint: First use similar triangles to express s as a function of the distance d from the streetlight to Charlie.)

Question

anonymous · Answer

s(t)=t
s(t)=4/3t
s(t)=5t
s(t)=4t
s(t)=6t

are the answers

anonymous · Answer

ok the answer is s(t)=4/3t ...could someone explain why though? i kinda guessed.

anonymous · Answer

i can draw out the pic they have too if u want...

anonymous · Answer

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amistre64 · Answer

i tend to use w for distance walked

anonymous · Answer

by "similar triangles "
$$\frac{s}{4}=\frac{s+d}{16}$$

anonymous · Answer

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