You are choosing between two different window washing companies. The first charges $5 per window. the second charges a base fee of $40 plus $3 per window. How many windows would you need to have for the second company to be preferable?

Thus, for more than 20 windows, the second company would be preferable

Step-by-step explanation:

Function Models

The two different window washing companies offer their services at two different schemes:

Company 1 charges $5 per window. Being w the number of washed windows, the function that models its costs is:

C1 = 5w

Company 2 charges a base fee of $40 plus $3 per window. The model for the costs is:

C2 = 40 + 3w

The equilibrium point where both companies charge the same occurs when C1 = C2, thus:

5w = 40 + 3w

Subtracting 3w:

2w = 40

Dividing by 2:

w = 20

Thus, for more than 20 windows, the second company would be preferable

$17.10

Step-by-step explanation:

Almonds being on sale

$3.8 per pound

4.5 pounds

We know that for every pound, the cost is three dollars and eighty cents, we are looking for 4.5 pounds in total.

Multiply the amount per pound to the amount of pounds being asked :

3.8 * 4.5

$17.10