The total cost, in dollars of membership in a fitness center is given by the function c(m) = 20m + 40,where m is the number of months a person is a member. in dollars ,how much is the cost of a membership for 1 year??

$264

Step-by-step explanation:

there are 12 months in a year so you would multiply the cost per month which is 20 then when you get the answer of 20*12 you add 40.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.