Question 1204638

The simple interest I varies jointly with the principal p, and time t. If the simple interest is $450 when the principal is $500 and the time is 6 years, find constant of variation (the rate) and the Interest when the principal is $800 and the time is 5 years.


{{{ I (alpha)P*t}}}

I= k*P*t

450= k*500*6

k= 450/(500*6)

k=0.15

I= 0.15*800*5

I=600

 The interest when the principal is $800 and the time is 5 years would be $600.