A store had 5 packs of paper for $7.80. How much would it cost if you were to buy 3 packs $1.56
$2.19
$7.80
$4.68

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

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?