In a lab experiment, 5300 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to double every 15 hours. How many bacteria
would there be after 7 hours, to the nearest whole number?

So 5300+5300=10,600. So then 7 hours is a little less than half of 15 hours so then i figure out how many bacteria are able to double in 7 hours. you would get 706.6666 per hour so then to check my answer i will do 706.6666 times 10 and i should get 10,600. And when I multiplied 15x706.6666 i would get 10,600. Now we have to do 706.6666x7 and your answer would be 4946.6662 in 7 hours. I hope that this helps

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )