An exercise specialist has studied your exercise routine and says the formula t=1.85 sqrt c+10 expresses the amount of time t, in minutes it takes you to burn c, calories while exercising. how many calories will you burn in 20 minutes? A) 107 calories
B) 1359 calories
C) 1379 calories
D) 127 calories

If the value of cos330°is√3/2 then find cos 165°.

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.

Me i’m stuck on all these questions besides the two bottom ones