How many cups of popcorn does harlan use per cup of cereal? how many cups of cereal does harlan use per cup of popcorn?

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

What is the difference between the points (4, 7) and (4, -5)? a. 0 units b. 2 units c. 4 units d. 12 units

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document