If the radius of a coin is 20cm ,find its surface area.

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?