At the end of 2 years, \( P \) dollars invested at an interest rate \( r \) compounded annually increases to an amount, \( A \) dollars, given by the following formula. \[ A=P(1+r)^{2} \] Find the interest rate if \( \$ 64 \) increased to \( \$ 100 \) in 2 years. Write your answer as a percent. Annual compound interest rate \( =\square \% \) (Type an integer or a decimal.)

How much would you need to deposit in an account now in order to have \( \$ 3000 \) in the account in 15 years? Assume the account earns \( 4 \% \) simple interest. Round your answer to the nearest cent.

Vivian and Michael plan to send their daughter to university. To pay for this they will contribute 8 equal yearly payments to an account bearing interest at the APR of \( 2.6 \% \), compounded annually. Four years after their last contribution, they will begin the first of five, yearly, withdrawals of \( \$ 46,900 \) to pay the university's bills. How large must their yearly contributions be? Submit Question

You want to be able to withdraw \( \$ 35,000 \) each year for 30 years. Your account earns \( 6 \% \) interest. a) How much do you need in your account at the beginning? b) How much total money will you pull out of the account? Question Help: How much of that money is interest? \$ideo 1 Video 2

iii. Offer What are the tax bands for small and medium enterprises in Zambi

How long will it take for an investment to triple, if interest is compounded continuously at \( 3 \% \) ? It will take \( \square \) years before the investment triples. (Round to the nearest tenth of a year.)