Which number is closest to ✓66?

What is the perimeter of square abcd? units units 28 units 37 units

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

Is a positive integer raised to a negative power always positive