Answer:
6 2/3 which is about 7 feet tall (answer is b)
Explanation:
10 foot-18 feet
x feet tall-shadow is 12 feet tall
So we should solve from the proportion. Remember to figure out the scale factor from multiplication and division. Not addition or subtraction.
18/12=1.5
Scale factor=1.5
10/1.5=6 2/3 which is about 7 feet tall