Can you guys help me figure out how to get the answers for these

Step-by-step explanation:

As you found in parts a and b, p = 840 − 2x, and R(x) = -2x² + 840x.

For part c, profit = revenue − cost.

P(x) = R(x) − C(x)

P(x) = -2x² + 840x − (2x² + 15x + 1500)

P(x) = -2x² + 840x − 2x² − 15x − 1500

P(x) = -4x² + 825x − 1500

The maximum profit is at the vertex of the parabola.

x = -b / (2a)

x = -825 / (2 × -4)

x = 103.125

Or, we can use calculus:

P'(x) = -8x + 825

0 = -8x + 825

x = 103.125

Rounding, the manufacturer should produce 103 refrigerators each week.

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

give more details

step-by-step explanation: