One of your classmates wants to start a car detailing business. He has decided to charge 30 dollars a car, but loses approximately fifteen dollars per hour in maintenance fees (this includes things such as water, electricity, location rental, supplies, and the repair and replacement of items). If the student washes twelve cars in eight hours, how much profit can they expect to make ?

$240

The reason why is because the friend charges $30 a car and has fees of $15/hour.  So you multiply the $30 by the amount of cars, which is 12.  You get $360.  Then, you multiply the fees ($15) by the amount of hours (8) to get $120.  You take the money you earn, which is $360, and subtract it by the total fees, which is $120.  $360-$120=$240.

Hope this helps! :D

answer: b. f(x) = (x + 2)^3 (x^2 - 7x + 3)^4

step-by-step explanation:

polynomials always have as many roots as their order. this is a 4th order polynomial- hence 4 roots!

complex roots of polynomials always come in pairs. the quadratic equation has the "+/-" in that will alwaysgenerate m+ni amd m-ni, so 7-2i must be a root of this polynomial equation.

the order of the numerator and denominator are both 2. so the horizontal asymptote is y=a2/b2 =7

verticle asymptotes are the forbidden x-values. f(x) becomes undefined at x=-3 because this value will cause a zero denominator.

a graph of r(x) will have vertical asymptotes at ±1 because these values will make the denominator zero. so the domain of the function cannot include ±1.

you 're wlecome! : )

cretdit to source

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation: