During his hike, milt drank 1 liter of water and 1 liter of sports drink how many milliliters of liquid did he drink

Icould really use some with this question.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?

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