Crystal deposits $850 into an account that earns interest at 6% p. a compounded quarterly. how long will it take for her investment to grow to $1000? show how you determined your answer.

It would take about 9 months for her income to grow to $1000

1000=850(1+0.06/4)^(4n)
1000/850=(1+0.06/4)^(4n)
4n=log(1000/850)/log(1+0.06/4)
N=2.8 years

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.