Afabrics company finds that the revenue, in dollars, from the sale of x jackets is given by r(x)=79√x. find the rate at which average revenue is changing when 439 have been produced.

47 - 90 = 43

43 - 180 = x

x = 137

step-by-step explanation: the answer is 27. first multiply .32 by 25 which equals 8. then add 8 to 25 which gives you 33. then you subtract that from 6 since she gave 6 to her brother.

,, add !

thus, the first answer choice, y = sec x, is the correct one