A college graduate statistics class has eighteen students. The ages of these students are as fol- lows: one student is 18 years old, two are 20, nine are 22, three are 24, two are 29, and one is 40.
Let X = age of any student (randomly selected). Find the probability mass function for X.

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second

Will gve pints stars and brainliest

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total