A set of final examination grades in a calculus course was found to be normally distributed with a mean of 69 and a standard dev
iation of 9. What percentage of students scored between 65 and 89?
1 answer:
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Answer:
28 units³
Step-by-step explanation:
The volume (V) of the prism is calculated as
V = Al ( A is the area of end face and l is the length )
Here A = and l =
, thus
V = ×
( cancel 21 and 3 by 3 and 2 and 8 by 2 )
= ×
= 7 × 4 = 28 units³