Divide. Reduce the answer to lowest terms.

3/7 ÷ 1 1/6

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax