Lea and Kim each improved their yards by planting rose bushes and shrubs. They bought their
supplies from the same store. Lea spent $22 on 1 rose bush and 3 shrubs. Kim spent $104 on 6
rose bushes and 11 shrubs. What is the cost of one rose bush and the cost of one shrub?

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.