Mr. Tyler has 45 books on a shelf in his classroom. If 80% of the books are fiction, how many fiction books are on the shelf?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Someone answer asap for ! michele pushes a box d meters across a floor. she uses a force f, in newtons, to push the box. she pushes the box for t seconds. the formula p = fd/t calculates the power, p, in watts, that it takes for michele to complete the task. solve the formula for d.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?