How to find the circumference for a 3 inch circle using 3.14 for pi

12. the amount of money in a bank account decreased by 21.5% over the last year. if the amount of money at the beginning of the year is represented by ‘n', write 3 equivalent expressions to represent the amount of money in the bank account after the decrease?

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Which expression gives you the distance between the points (5,1)and(9,-6)