X/5 =-20 what could the answer be to this

Alake near the arctic circle is covered by a 222-meter-thick sheet of ice during the cold winter months. when spring arrives, the warm air gradually melts the ice, causing its thickness to decrease at a constant rate. after 333 weeks, the sheet is only 1.251.251, point, 25 meters thick. let s(t)s(t)s, left parenthesis, t, right parenthesis denote the ice sheet's thickness sss (measured in meters) as a function of time ttt (measured in weeks).

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.