What is equvalint to 1/2a-4

Find the simple interest earned to the nearest cent for each principal,interest rate,and time 735 7% and two and a half years

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

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)