Please answer and give an explanation for the question below.

For the function, f(x) = -5x 2, find f(-4).

Two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: what is the approximate distance, in feet, between the two poles? 6.93 feet 8.66 feet 12.32 feet 15.59 feet

Sections of prefabricated wood are each 5 1/3 feet long. how long are 7 1/2 sections placed end to end?