A sample of a radioactive isotope had an initial mass of 700 mg in the year 1991 and decays exponentially over time. A measureme
1 answer:
You might be interested in
Answer: 0.0478
Step-by-step explanation:
Given : The life of a particular brand of laptop battery is normally distributed with a mean of 8 hours and a standard deviation of 0.6 hours.
i.e.
Let x be the random variable that represents the life of a particular brand of laptop battery.
Then , the probability that the battery will last more than 9 hours before running out of power will be :-
[∵
]
[∵ P(Z>z)=1-P(Z≤z)]
[using P-value table for z]
Hence, the probability that the battery will last more than 9 hours before running out of power = 0.0478