What number can be divided in both 90 and 100 with no remainder

How many zeros does the function f(x)=4x3-x2+1 have

Which rational number could be graphed between -4 and -5

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