Ijust need number 8 done. we’re doing it by method of substitution.

How do you find principle and simple interest

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?