Ten students from a class participated in a contest. The scores obtained by each student are shown. {11, 16, 7, 13, 21, 13, 16, 9, 13, 16}
What is the range in the scores?
A)
14
B)
B)
15
Eliminate
C)
16
D)
17

Titus works at a hotel. part of his job is to keep the complimentary pitcher of water at least half full and always with ice. when he starts his shift, the water level shows 4 gallons, or 128 cups of water. as the shift progresses, he records the level of the water every 10 minutes. after 2 hours, he uses a regression calculator to compute an equation for the decrease in water. his equation is w –0.414t + 129.549, where t is the number of minutes and w is the level of water. according to the equation, after about how many minutes would the water level be less than or equal to 64 cups?