The cost to produce one compact disc is $1.75 plus a one-time fixed cost of $2900. The revenue received from selling one compact disc is $13.

(a) Write a formula that gives the cost C of producing x compact discs. Be sure to include the fixed cost.
C = 1.75x + 2900 (Simplify your answer.)

(b) Write a formula that gives the revenue R from selling x compact discs.
R= boxed 13x (Simplify your answer.)

(c) Profit equals revenue minus cost. Write a formula that calculates the profit P from selling x compact discs.
P = 11.25x - 2900 (Simplify your answer.)

(d) How many compact discs need to be sold to yield a positive profit?
__ or more compact discs should be sold. (Simplify your answer.)

11.25x - 2900 > 0

11.25x > 2900
x > 2900/11.25
x > 258.22

Therefore, 259 or more compact discs should be sold to yield a positive profit.

To yield a positive profit, we need to find the value of x where P is greater than 0.

P = 11.25x - 2900

Setting P greater than 0, we get:

11.25x - 2900 > 0

11.25x > 2900

x > 2900 / 11.25

x > 257.777

Since x represents the number of compact discs, we round up to the nearest whole number.

Therefore, 258 or more compact discs should be sold to yield a positive profit.

To find the number of compact discs that need to be sold to yield a positive profit, we need to set the profit formula P = 11.25x - 2900 greater than zero and solve for x.

11.25x - 2900 > 0

Now, let's solve for x:

11.25x > 2900

Divide both sides of the inequality by 11.25:

x > 2900 / 11.25

Simplifying the right side of the inequality:

x > 256.88

So, we need to sell more than 256.88 compact discs to yield a positive profit.

Since we cannot sell a fraction of a compact disc, we round up to the nearest whole number. Therefore, we need to sell 257 or more compact discs to yield a positive profit.