Question

Marco needs to climb up to the roof of his house. He placed his

ladder so that the bottom of the ladder was 4 feet away from the
wall. If his ladder was 13 feet long, how high up was the top of the
ladder against the wall of the house?

Answer 1

12.4 feet

Explanation:

Pythagorean theorem

a^2 +b^2 = c^2

4^2 + b^2 = 13^2

16 + b^2 = 169

b^2 = 153

b=12.4 feet