Math
posted by Anonymous .
How long will it take $4000 to double if it is invested at 7.85%?

solve for n
8000 = 4000(1.0785)^n
2 = (1.0785)^n
you will have to use logs
Respond to this Question
Similar Questions

math
how long will it take for $7600 to double if invested at 4.2%,componded continously 
Math
If $8,500 is invested at 6% compounded continuously, how long will it take to double the investment? 
Math
If $8,500 is invested at 6% compounded continuously, how long will it take to double the investment? 
math
you invested $4000 in two accounts paying 2% and 9% annual interest, respectively if the total interest earned for the year was $150, how much was invested at each rate. $_was invested at 2% and _$ was invested at 9% 
log
how long will it take $40,000 invested at 9% compounded continuously to double A=Pe^rt 
How long will it take the investment to double?
$3,600 is invested in an account at an annual interest rate of 4.8% compounded continuously. How long, to the nearest tenth of a year, will it take the investment to double in size? 
maths
Given that the compound interest formular when A=p(1+r/n)nt where A is the amount accumulated at the end of tyears. if p is invested compounded n times per year.how long will it take 500000 to double if its invested at 12percent. 
Finance
how long will it take $3,500 to double when it is invested at 3.8% 
Math
If $3000 is invested at 6% p.a. compounding yearly, how long will it take to double the value? 
Math
how long does it take an investment of $8000 to double if it is invested at 7% interest compounded continuously. round to nearest year.