In one county, the farms had a mean harvested area of 103 acres with a standard deviation of 9 acres. What will be the mean and standard deviation of the distribution of area in square kilometers?
1 acre approximately equals 0.004 square kilometers.

A) Mean: 0.412 square kilometers
Standard deviation: 0.036 square kilometers

B) Mean: 0.412 square kilometers
Standard deviation: 9 square kilometers

C) Mean: 103 square kilometers
Standard deviation: 0.036 square kilometers

D) Mean: 103 square kilometers
Standard deviation: 9 square kilometers

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.