Question

John is selling candy bars the equation is p=c^2+2c-5 determines the profit,p, where c is the number of candy bars sold what is the minimum number of candy bars he needs to sell to make profit

Answer 1

2

Explanation:

Find the value of c where p = 0.

0 = c² + 2c − 5

6 = c² + 2c + 1

6 = (c + 1)²

±√6 = c + 1

c = -1 ± √6

c must be positive, so c = -1 + √6 ≈ 1.45. So John must sell at least 2 candy bars to make a profit.

We can also show this using trial and error.

If c = 0, then p = -5

If c = 1, then p = -2

If c = 2, then p = 3