Aboat travels 32 miles on 4 gallons of fuel. how many miles per half gallon is that?

Ihave trouble finding the nth term of a linear sequence

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

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?