To rent a certain meeting room, a college charges a reservation fee of 15 and an additional fee of 5 per hour. the chemistry club wants to spend less than 45 on renting the room. what are the possible numbers of hours the chemistry club could rent the meeting room?

The stem-and-leaf plot shows the heights in centimeters of teddy bear sunflowers grown in two different types of soil. soil a soil b 5 9 5 2 1 1 6 3 9 5 1 0 7 0 2 3 6 7 8 2 1 8 3 0 9 key: 9|6 means 69 key: 5|8 means 58 calculate the mean of each data set. calculate the mean absolute deviation (mad) of each data set. which set is more variable? how do you know?