Anna has been studying a type of bacteria that triples every month. originally, there were 4 bacterial cells. she wants to know how many there will be after 15 months. which equation should she use? a) a15 = 4(3)(15) b) a15 = 4(3)15 c) a15 = 4(3)15 − 1 d) a15 = 4(3)(15 − 1)

As per the given information;

Bacteria triples every month.

Originally, there were 4 bacterial cells.

We are suppose to find how many there will be after 15 months.

Hence we can say , the number of bacteria after n month can be given using the exponential growth function

So number of bacteria after 15 month will be

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925