Question

How much is the bill for a person who uses 300 kwh in a month

Answer 1

Choice D.

Step-by-step explanation:

We ar told that if x > 200, then we would use the bottom equation to calculate the bill amount. Now, in our case 300 > 200; therefore, we use

`0.10(x-200)+30`

Putting in x = 300 gives

`\begin{gathered} 0.10(300-200)+30=10+30 \\ =40 \end{gathered}`

Hence, the correct choice is Choice D.