Jose and his friends dined in a Mexican restaurant. The cost of the meal was $20.50. What was the final cost after they paid 9.5% for the sale tax and 15% for the tip? Show your work

Use a calculator basically

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.