A packet of 5 cheapo cost $4 and last 6.5 hours. How many packs would you have to buy to last 52 hours and the cost of them ?

Question

Colleg math . Math of liberal arts

Answer 1

If 1 pack lasts for 6.5 hours, then 2 packs will last for 13 hours. Following this pattern, 8 packs will last for 52 hours. The cost would be 8 * 4 = $32.

Answer 2

Since we know that one pack lasts 6.5 hours, we can divide to find out how many packs we will need to last 52 hours.

 

52 ÷ 6.5 = 8 packs.

 

Since each pack costs $4, 8 packs will cost 8 x $4 = $32.