If the box is 7 inches long by 3 inches wide , by 12 inches high ,how much surface area do they have to make the cereal box

Really need on these. i have no idea what to do

Blank × 10-3 is 2,000 times greater than 1.9 × 10-6. it is also blank times greater than 9.5 × 10-4.

The scale for a map is 20 miles = 1/2 inch. the distance between two towns on the map is 3 3/4 inches. what is the actual distance between these towns? 150 miles 38 miles 75 miles 135 miles