James invested $4,000 at 5% interest per year; how long will it take him to earn $200 in simple interest?

It takes 1 year.

Step-by-step explanation:

You have to apply simple interest formula, I = (P×R×T)/100 where I represent interest amount, P is principle, R is interest rate and T is number of years :

We, know that :

By putting values, we have

It takes 1 year for him to earn $ 200 in simple interest.

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation

it is only things thain can be deafeated

step-by-step explanation: