Tis 170 miles from bruce’s house to the city where his brother lives. on his last trip to visit his brother, he drove for 2 hours at 55 miles per hour. then he came to some very bad road construction. the rest of the trip took 2 hours. how many miles per hour did bruce drive for the rest of the trip?

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.