Name 5 mathematical formulas that include pi

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.

Classify the following number. −9.070707…