$20,000 $18.400 $16.928 $15.573.76 If the original price of the car was $20,000, what is the depreciation rate?
What will the car be worth after 6 years?

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.