I've spent hours trying to figure these three out, i'm probably over thinking them. will someone answer the following two math problems? i've set 20 points as the reward, and i will mark a brainliest.

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).

Equation for the calculation double 2 and then add 5

What makes a trapezoid an isosceles trapezoid?