Free points just say hi! :)

Me with this one question, and i'll upvote the brainliest answer

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

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?