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11

Step-by-step explanation:

x= -b/2a

x= -8/2(-2)

x=-4/-2

x=2

f(2) = -2(2) +8(2)+ 3

f(2) = -8 +16 + 3

f(2) = 11

Maximum value is 11

11

Step-by-step explanation:

it has a vertex at (2,11)

.

f(2) = 11

how to find the vertex;

function equation is f(x) = ax^2 + bx + c

we can find x by :-b/2a, -8/-4 = 2

and by putting the x value we get the y

f(2) = 11

the fixed costs per month is $14400

Step-by-step explanation:

Total cost = fixed cost + variable cost.

The tennis equipment manufacturer, has variable costs of $0.60 per unit of product. In August, the volume of production was 27,000 units. This means that the total variable cost from producing 27000 units is

27000 × 0.6 = 16200

If the total production costs incurred were $30,600, then the fixed costs per month would be

30600 = fixed cost + 16200

Fixed cost = 30600 - 16200

Fixed cost = $14400