Answer:
Part a) It cost approximately $13.70
Part b) Approximately 210 hours
Step-by-step explanation:
Part a)
step 1
Find the total watts per hour
[tex]1,800(5)=9,000\ watts[/tex]
step 2
Multiply the number of watts by 24 hours (1 day)
[tex]9,000(24)=216,000\ watts[/tex]
convert to kilowatt
Divide by 1,000
[tex]216,000\ watts=216,000/1,000=216\ kilowatts[/tex]
step 3
Find the cost
Multiply $0.06341 by the total kilowatts
[tex]216(0.06341)=\$13.70[/tex]
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
[tex]0.075x\ kilowatts[/tex]
we know that
0.075x multiplied by $0.06341 must be equal to $1
so
[tex]0.075x(0.0634)=1[/tex]
solve for x
[tex]x=1/0.004755\\x=210\ hours[/tex]
