# Math

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The amount of a monthly electric bill (B, measured in \$) depends
on the amount of electricity used that month (E, measured in
kWh). A typical public utility charges \$0.12 per kWh for the first
300 kWh used, \$0.17 per kWh for the next 600 kWh used, and
\$0.29 per kWh for any excess electricity used that month.

How much would I have to pay if the amount of electricity used was 800? I'm a bit confused about how to calculate this...

• Math -

300 + 500 = 800

.12(300) +.17(500) = ?

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