The function graphed below models the revenue of a company as a function of the price of their product. Approximately what prices result in no revenue? (check all that apply)
A. $0
B. $31.80
C. $2,528,100
D. $63
E. $30​

C. as the revenue goes down it slowly increases causing it to keep on increasing i picked c because it is the best answer                                                  

ok then what happened.

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -