Write an expression to represent each situation. 1. Michael earns $300 per week plus $10 for each new customer he signs up. Let c represent the number of new customers Michael signs up. Write an expression that shows how much he earns in one week.

2. A man’s age today is four years less than five times the age of his oldest son. Let a represent the son’s age. Write an expression to represent the man’s age.

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.