Isaac practiced the piano three days last week for a total of 9 1/2 hours. On average, how many hours each day did Isaac practice? A. 3 hours
B. 3 hours and 6 minutes
C. 3 hours and 10 minutes
D. 4 hours

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