What is 1578 x 3490 divded by 8 x 4?

How do you find principle and simple interest

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

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?