What will be the annual salary for a mechanic who works 40 hours per week for 52 weeks a year and makes $25.21 per hour? (remember, there are 365 days in year, 52 weeks in a year, and 12 months in a year.)

Salary = 40hrs x 52wks x $25.21 

= $52,436.80 per year

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.