Grace placed 3 strands of bacteria in a petri dish. The bacteria strands triple every hour. Write a formula to represent how many bacteria strands are present at the nth hour. Then use the formula to determine how many strands of bacteria are present at 4 hours.

It is 7 because it is the absolute value

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.

Is a for each hour he works,his earnings go up by $4