Question

PLEASE ANSWER ASAP

Answer 1

Answer:

10,000 pPhones.

Step-by-step explanation:

The cost to manufacture x pPhones is given by the cost function:

$C(x)=-25x^2+49000x+21390$

And the revenue for selling x pPhones is given by the revenue function:

$R(x)=-29x^2+129000x$

We want to determine the number of pPhones the Pear Company should sell to maximize profits.

First, we can find the profit function. Profit is given by:

$P(x)=R(x)-C(x)$

Therefore:

$P(x)=(-29x^2+129000x)-(-25x^2+49000x+21390)$

Simplify:

$P(x)=(-29x^2+129000x)+(25x^2-49000x-21390)$

Add. So, our profit function is:

$P(x)=-4x^2+80000x-21390$

Note that our profit function is a quadratic. The maximum point of a quadratic is always its vertex. So, we can find the vertex of the profit function.

The coordinate of the vertex is given by:

$\displaystyle \Big(-\frac{b}{2a},f\Big(-\frac{b}{2a}\Big)\Big)$

In this case, a = -4, b = 80000, and c = - 21390.

Therefore, the point at which profit is maximized is:

$\displaystyle x=-\frac{80000}{2(-4)}=-\frac{80000}{-8}=10000$

Therefore, in order to maximize profits, the Pear Company should sell exactly 10,000 phones.

Notes:

And the maximum profit will be:

$P(10000)=-4(10000)^2+80000(10000)-21390=\ 399,978,610$