2.b. Divide both sides by 100 to isolate the variable.
2d. Square both sides to clear the radical and isolate the variable.
3a. You need to calculate 1/6 of 37 which equals 6 1/6. So, that means Pluto is the answer.
3b. You need to calculate 2 1/2 time 100 which equals 250, so Jupiter is the answer.
