Question

Complicated question please help..

Answer 1

Part a) It cost approximately $13.70

Part b) Approximately 210 hours

Explanation:

Part a)

step 1

Find the total watts per hour

`1,800(5)=9,000\ watts`

step 2

Multiply the number of watts by 24 hours (1 day)

`9,000(24)=216,000\ watts`

convert to kilowatt

Divide by 1,000

`216,000\ watts=216,000/1,000=216\ kilowatts`

step 3

Find the cost

Multiply $0.06341 by the total kilowatts

`216(0.06341)=\$13.70`

Part b) Let

x ----> the number of hours

Multiply the total watts by the number of hours

75x

Convert to kilowatts

Divide by 1,000

`0.075x\ kilowatts`

we know that

0.075x multiplied by $0.06341 must be equal to $1

so

`0.075x(0.0634)=1`

solve for x

`x=1/0.004755\\x=210\ hours`