If x represents time, the average rate of change of the function f(x) in the first two seconds is

Could someone give me some steps on how to solve piecewise functions?

Sandra wants to evaluate 2 cot her work is shown below. what did she do wrong?

Will needs 8 hours of sleep every night, brad needs 9 hours, and nick needs 10. one saturday, they all have to get up at 6 a.m. to go fishing. on friday evening, who will be the first to bed?