Question

The Formula C = 20W shows how much the cost, C, of sending a letter by first-class mail depends on the weight of the letter, W. (C is measured in cents and W is measured in ounces). So you consider C a function of W and write C(W) = 20W. Find C(2) , C(3), and C(4). What is the domain of C?
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Answer 1

Answer:

Domain: of C(W) is 0≤W

C(2) = 40

C(3) = 60

C(4) = 80

Answer 2

The Domain of C(W) will be 0≤W

In order to solve the question as C is a function of W, we'll have to multiply the figures given by 20 and this will be:

Since C = 20W

C(2) will be:

= 20W = 20 × 2 = 40

C(3) will be:

= 20W = 20 × 3 = 60

C(4) will be:

= 20W = 20 × 4 = 80

In conclusion, the domain of C(W) will be 0≤W

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