If $4000 is invested in an account that pays interest compounded continuously, how long will it take to grow to $8000 at 7%?

So, since it is continuously, we need to think of PERT

So, we just plug our numbers in to solve for T

It will take 15.479 years

yes, gavin is right.

step-by-step explanation:

gavin is correct. 

this problem is about converting 9% per year to how many percent per quarter. the rate is still the same. it only differed in the time period. so, through dimensional analysis,

9% per year  × (1 year / 4 quarters) = 2.25% per quarter

if he was asked to convert 9% per year to how many percent per quarter  compounded quarterly, then you will not simply divide by four. this is because compounding is not linear.

hope this , have a good day. c;