Abby can buy an 8-pound bag of dog food for $7.40 or buy a 4-pound bag of the same dog food for $5.38. which is a better buy? show your work

12 3 4 5 6 7 8 9 10 time remaining 59: 02 charlie is evaluating the product of 0.09 and 0.05. he multiplies, and before placing the decimal, arrives at an answer of 45. after considering the decimal placement, what is charlie's final answer? 0.0045 0.045 0.45 0.4545 mark this and return