A laptop uses about 0.5 kilowatt of electricity per hour. if electricity costs $0.12 per kilowatt, how much does it cost to run the lap top for an hour?

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

Which table shows a proportional relationship between miles traveled and gas used?

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?