The function C(x)= -2x^2+38x+40 models the sales, in hundreds of millions of dollars, of compact discs for years since 1990. Part A: Rewrite the function to reveal when sales of compact discs are $0

Part B: What are the zeros of the function?

Part C: Use the context to interpret the zeros.

Please show the steps it would help me out a lot

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153