A statistics professor finds that when he schedules an office hour for student help, an average of 2.8 students arrive. Find the probability that in a randomly selected office hour, the number of student arrivals is 6.

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?

How can you find the mean absolute deviation (mad) for this set of data?