Asked by linna

A painter places an 8.5 ft ladder against a wall. The bottom of the ladder is 4 ft from the base of the wall. How high up the wall does the ladder reach?
Answered by Reed
There is a whole class to study your high school? It must be fascinating.
Answered by PsyDAG
Pythagorean Theorem

a^2 + b^2 = c^2

a^2 + 4^2 = 8.5^2

Solve for a.