Factor y^2 + 4y - 252 = 0

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

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

What else equals 42 and 30 for multiply