Answer:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the lifetime for a TV of a population, and for this case we know the distribution for X is given by:
Where
and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability like this:
And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.
456.98-10-14.95-6.07-109.10-30=<span>286.86
So her new </span>checkbook balance is $286.86
Answer:
She is given $205 and spends $57.
She earns $580 and spends $422.
She is given $38 and earns $42.
She earns $56 and is given $59.
Step-by-step explanation:
You just have to do the math.
639293!47,behdjdkevejskksnsbwjajMsbdhcifmensbjxocnfndoxold
Answer:
I think it will travel 10 yards
Step-by-step explanation:
Because John and Bill and Ron Weasley from Harry Potter they are
Standing 10 yards from each other.