Answer:
Manufacturers has to produce 63 DVD/Blu-Ray players to achieve a minimum cost of $644
Step-by-step explanation:
The cost equation is given as:

This is a quadratic equation in general form, which is:

Matching, we can say:
a = 0.04
b = -5
c = 800
The minimum occurs at 
and the minimum value would be to place that "x" value into the equation.
First, we find the minimum using values of a and b:

Plugging this into original, we get:

Rounding off to nearest whole number, we can say:
Manufacturers has to produce 63 DVD/Blu-Ray players to achieve a minimum cost of $644
Answer:
23.64
Step-by-step explanation:
× (2 - 5)² + 6
=
× (- 3)² + 6
= 1.96 × 9 + 6
= 17.64 + 6
= 23.64
Answer:(1,23)(2,21)(4,17)(6,13)
Step-by-step explanation:
Plug in the x values in the graph to the function. For example plug in 2 to it and you get 25-2(2) which transfers to 25-4. 25-4 equals 21
Answer:
In the question 4/0, the denominator is zero so it is not a rational number.