which is more economical purchasing the economy size of a detergent at 3 kilograms for 3.15 or purchasing the regular size at 800 grams for 60 cent

Answer 1

To compare the two options, we need to find the cost per unit of each size of detergent:

For the economy size:
3 kilograms = 3000 grams
Cost = $3.15
Cost per gram = $3.15 ÷ 3000g = $0.00105/g

For the regular size:
800 grams
Cost = $0.60
Cost per gram = $0.60 ÷ 800g = $0.00075/g

Therefore, the regular size detergent is more economical, as it costs less per gram ($0.00075/g) compared to the economy size ($0.00105/g).