What is the circumference? Use 3.14 for π. Round to the nearest tenth if necessary. radius: 9 mm
A. 12.1 mm B. 14.1 mm C. 28.3 mm D. 56.5 mm

What should be done to solve the equation? x+14=21 add 14 to both sides of the equation. subtract 14 from the left side of the equation. add 14 to the left side and subtract 14 from the right side of the equation. subtract 14 from both sides of the equation.

Can someone explain to me how to do

Abook store is having a 30 perscent off sale. diary of the wimpy kid books are now 6.30 dollars each what was the original price of the books