Solve for the nearest whole number

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Interest begins accruing the date of the transaction except for auto loans mortgages credit card cash advances credit card purchases