3 weeks late and i have over 50 missing assignments please help me get this done

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Me, prove a quadrilateral with vertices g(1,-1), h(5,1), i(4,3) and j(0,1) is a rectangle using the parallelogram method and a rectangle method.

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