A recipe for a pitcher of lemonade calls for 7/8 cup of sugar, 3/4 cup of lemon juice, and 3 3/4 cups of water. How many total cups of sugar, lemon juice, and water will be needed for three pitchers of lemonade?

Ineed with math stuff it involves graphs

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?