Calculating income commerce

christine earns a wage of $6.50 an hour. last week she worked 8 hours a day during the week and an extra 4 hours on sunday. for which she is paid double time. how much did she earn

She earned 20.5 dollars i hope i helped

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.