Identify the type of sampling method used. a trucking company places their office phone number on the back of all their vehicles to receive comments on how well their employees are driving.

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Which of the following vectors are orthogonal to (2,1)? check all that apply