During a storm, the level of a river rose to a height of 40 inches above normal. The graph below models the river's height above normal in the
hours after the storm.
River's Height Above Normal
50
40
30
Height (in.)
20
10
0
1 2 3 4 5 6 7 8 9 10
Time (h)
What point on the graph represents the river's height as soon as the storm
ended?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.