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Luke receives an electric bill of \$84.21 for the month of Ap...
SAT-math-test SAT math 0 Luke receives an electric bill of \$84.21 for the month of April. The electric company charges \$0.14 per kilowatt-hour (KWh) of electricity. Given that April has 30 days, about how many kilowatt-hours did Luke use per day during the month of April?

A. 12 KWh

B. 20 KWh

C. 26 KWh

D. 30 KWh

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19 November 2020 School not set Nigeria
20 November 2020 0 First, convert 30 days to hour.

Since 1 day = 24 hours

30 day = x

cross multiply

x day = 720 day hour

divide both sides by 1 day

x = 720 hours

Thus, 30 days = 720 hours

Next,

since \$0.14 = 1 KWh

\$84.21 = x

cross multiply

\$0.14x = \$84.21 KWh

divide both sides by \$0.14

x = 601.5 KWh

Thus, for 30 days (720 hours), the company charges 601.5 KWh.

Similarly, if Luke uses x KWh per day, and 601.5 KWh per 30 days,

601.5 KWh = 720 hours

x          =  24 hours [beacause 24 hours is equivalent to 1 day)

cross multiply

720x hours = 14,436 KWh hours

divide both sides by 720 hours

x = 20.05 KWh

Therefore, Luke uses 20 KWh per day Share

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