Car2go charges a base rate of $25.99 per month plus $19.99 per hour to rent a car. zipcar charges a base rate of $15 per month plus $21.99 per hour to rent a car. how many hours of driving per month would result in the same cost from car2go and zipcar? round your answer to the nearest tenth of an hour.

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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.