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whats 1x0 im stumped :(

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

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

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?