He grocery sells beans in bulk. the grocer's sign above the beans says, "5 pounds for $4."
at this store, you can buy a number of pounds of beans at the same rate, and all rices include tax. alberto said, "the ratio of dollars to the number of pounds is 4: 5. that's $0.80 per pound." beth said, "the sign says the ratio of the number of pounds to the number of dollars is 5: 4. that's 1.25 pounds per dollar."
a. are alberto and beth both correct? explain.

b. do you prefer to answer parts (a) and (b) using albertos rate $0.80 per pound, using beth's rate of 1.25 pounds per dollar, or using another strategy? explain