SOLUTION: A low pressure sodium lamp is used for a security light. The light is on for an average of 14 hours each day during the month of December. If the light bill for the security light

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: A low pressure sodium lamp is used for a security light. The light is on for an average of 14 hours each day during the month of December. If the light bill for the security light       Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1101550: A low pressure sodium lamp is used for a security light. The light is on for an average of 14 hours each day during the month of December. If the light bill for the security light for December is $1.80 at a 6.9 cent per kilowatt-hour rate, what is the wattage of the lamp?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
[ total cost in cents / hours of use ] / [ cents ] / [ kw x hrs ] = [ kw ]
+%28+180+%2F+%28%28+31%2A14+%29%29+%29+%2F+6.9+
+%28+180+%2F+434+%29+%29+%2F+6.9+
+180+%2F+2994.6+=+.0601+ kw
+.060%2A1000+=+60+
( 1000 watts = 1 kw )
The lamp is 60 watts
------------------------
get another opinion if needed