Frank invests $1,000 in simple interest investment account that pays 8% a year. after a number of years, he withdraws his balance of $2,200. using the formula mc006-1.jpg, how many years was his money invested?

Hi there
The formula is
A=p (1+rt)
We need to solve for t
T=[(A/p)-1]÷r
Where
A future value 2200
P present value 1000
R interest rate 0.08
T time?
So
T=((2,200÷1,000)−1)÷0.08
T=15 years

Another time like this question you should post in at mathematics subject
Hope it helps

  consider  the  following scenario,  then describe  how  you might conduct  a  study using  ansrs,  convenience sample, and a  voluntary response sample.  you  are  interested  in  parents'  opinion  of the  war  in  iraq.  your population  is  parents  of  high school students.  your question  is, "do you  believe that the  war  in 

Honestly i have no i guess the creators didnt think of that