Please give me the correct answer

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.