Four glasses of milk and 2 snack bars have a total of 78 carbohydrates (carbs), and 2 glasses of milk and 3 snack bars have a total of 61 carbs. Determine how many carbs are in one glass of milk and in one snack bar.

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *