Harry and Michael went to lunch and the subtotal was $24.50. Using the tax rate of 8 3/8%(0.08375) how much did they have to pay in tax(round two spaces to the right of the decimal)?
What is the new total?
Now they want to leave a 20% tip based on the total, how much will they leave as a tip?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.