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gonzalesnik
11.03.2020 •
Mathematics
Lunch break: In a recent survey of 600 working Americans ages 25-34, the average weekly amount spent on lunch as S45.32 with standard deviation S2.87. The weekly amounts are approximately bell-shaped. Part 1 out of 3 Estimate the percentage of amounts that were less than S42.45. Round the answer to one decimal place. Approximately % of the amounts were less than $42.45.
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Ответ:
Step-by-step explanation:
given that in a recent survey of 600 working Americans ages 25-34, the average weekly amount spent on lunch as S45.32 with standard deviation S2.87.
The weekly amounts are approximately bell-shaped
so for practical purposes we assume X = ages of working Americans is N(45.32, 2.87)
Estimate the percentage of amounts that were less than S42.45
First let us find probability
P(X<42.45) = F(42.45)
=![P(Z](/tpl/images/0542/2408/29a39.png)
= 0.5-0.3413
=0.1687
So 16.87% of the amounts were less than 42.45 dollars
Ответ:
42 days
Step-by-step explanation:
Given
Leakage = 5 gallons in 3 days
Required
Determine the number of days it finish leaking out
The scenario can be represented as:
5 gallons = 3 days
and
70 gallons = x
Where x represents the number of days to leak out 70 gallons
Cross Multiply:
Divide both sides by 5
Hence, it'll take 42 days