What is the sales tax for a dress that costs 37.99 and a pair of shoes that cost 39.99. The sales tax is 8.25%.

What is the number 321,000,000 in scientific notation? also what is the 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

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?