A circle has radius 10 centimeters. Suppose an arc on the circle has length centimeters. What is the measure of the central angle whose radii define the arc?

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