Pls help me with this question, topic is 7th grade probability!

Which value is not a solution of 8x^3 – 1 = 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

Jim had 15 minutes to do 5 laps around his school what would his time be