What's the product of 3 2/3 and 14 2/5 ? A. 52 4/5 B. 52 4/15 C. 54 D. 42 4/5
1 answer:
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Answer:
24 months
Step-by-step explanation:
Lifespan with z-score of -3 in the the set of normally distributed life spans of an appliance can be calculated using the equation:
where
- X is the lifespan we are looking for
- M is the mean life span of the appliance (48 months)
- s is the standard deviation of the distribution of the life spans (8 months)
We have that is
-24=X-48 and
X=24 months.
The life span of an appliance that has a z-score of -3 is 24 months.