Asia Patel

Mathematics

14 August, 17:06

Quincy is trying to estimate the height of a tree in his backyard. He measures the tree's shadow as 12 ft. He stands near the tree and measures his own shadow as 3 ft. Quincy knows that he is about 5 ft tall. He estimates the height of the tree by following these steps:

Step 1: Set up a proportion

x/12 = 3/5

Step 2: Cross multiply

5x = 12 * 3

Step 3: Simplify

5x = 36

Step 4: Solve for x

x = 7.2 feet

In which step did Quincy make a mistake?

A) Step 1

B) Step 2

C) Step 3

D) Step 4