Can somebody explain how to solve this problem

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

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

The anwser cause i do not understand just plez