Item $80 yesterday. Today it's $36. What's the % difference

The data represents the semester exam scores of 8 students in a math course. {51,91,46,30,36,50,73,80} what is the five-number summary?

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line