Amagazine claims that 75% of all teenage boys have their own cellphones. a researcher wished to test the claim and selected a random sample of 60 teenage boys. she found that 54 had their own cell phones. at α = 0.01, should the claim be rejected?

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?