7. The volume of a cylinder is 9801 in. The height of the cylinder is 20 in. What is the radius of the cylinder?
A. 7 in.
B. 49 in.
C. 327 in.
D. 18 in.
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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?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212