What is the answer to this?

Asphere has a diameter of 10 in. what is the volume of the sphere?

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

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu