Sanjay is comparing the cost of cell phone services. The phone he wants costs $50 at Dover Cellular, and the unlimited calling plan through their carrier would cost $3 per day. At Garrison Electronics, Sanjay could purchase the same phone for $60 and also get an unlimited calling plan for $2 per day. After some number of days, the two options would end up having the same total cost. What would the total cost be?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?

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.