PLS HELP I REALLY CAN'T FAIL I'LL GIVE OUT A BRAINLIEST!!!

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

What is the circumference of a circle with an area of 50.24 cm²?

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio