Which expression is equivalent to pi*-80

Tiffany sold 4 paintings in 3.5 months. Which rate represents this situation? A. 3.5paintings/4months B. 14months/4paintings C. 4paintings / 3.5months<==my answer D. 4months/14paintings

Describe the circle given by the equation (x - 7) ^2 + (y - 8) ^2 = 9.

To reduce wear and tear on the family vehicle, you decide to rent a car. Happy Harry's Rentals has a $500 fee for any rental up to eight days. Smilin' Sam's offers the same car for $200 plus $50 per day. Which deal is better?

While painting, Sam notices that 1/2 cup of paint covers 1/3 of a sign. What is the amount of paint needed to cover the entire sign? A: 2/3 cup B: 5/6 cup C: 1 cup D: 3/2 cups

Yuri invests $2,000 in an account with compound interest at 6%. Maria invests $3,500 in an account with compound interest at 4%. Using the rule of 72, T=72/R how many years with it take Yuri and Maria to double their money?

The temperature in your town is 31 degrees Fahrenheit. The radio announcer says that the temperature will drop 15 degrees. What will the temperature be?

If the numerator of a fraction is larger than the denominator of the fraction, than it is greater than 1

Part 1: what are the conditions for using the standard deviation formula when conducting a significance test? be specific about p versus p-hat. part 2: what are the conditions for approximating with a normal distribution?'

If the length of one leg of a right triangle is 16 and the length of the hypotenuse is 2 more than the length of the other leg, what are the lengths of all the sides of the triangle?

2. 3 times the sum of a number x and 13