What is 938,492,948,934,895*929,038,292,839 ,283,892,948,394,839

What situation is an example of an observational study

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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?