A paper cone has an e-inch slant height and an r-inch base radius. In terms of the quantities e and r, write a formula for the lateral surface area of the cone. In other words, find the area of the circular sector obtained by cutting the cone from base to vertex and flattening it out.

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old