Urgent! answer these questions and show work! 50 points!

(a)

60 thousand dollars

(b)

1 thousand MP3 players

(c)

0 or 2000 MP3 players

Step-by-step explanation:

(a)

We start by finding the derivative, which is -120x+120. We can find this by using the power rule, which has 60x² turn into 2*60*x, and 120x turn into 1*120*1. Finding the stationary points, or when the derivative is 0/when the graph goes from up to down or vice versa, we solve for -120x+120=0, so 120=120x and x=1. Plugging this in, P is 60, and is clearly not a minimum as r(0) = 0, where r is the function. Thus, as this is a local maximum and there is only 1 stationary point, this is the maximum. (a) is then 60.

(b)

This is 1, which has already been established.

(c)

For this, we must find when the profit, or 120x-60x^2, equals 0. We then have 120x-60x^2=0. Dividing both sides by 60x, we get 2-x=0, and x=2. However, this is not the only answer, as there is at least one x in both 120x and 60x^2. Therefore, we must check for 0, and since r(0) is 0, that is a correct answer as well.

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°

idk man good luck man