Answer: 5
Step-by-step explanation:
Use the distance formula to determine the distance between the two points.
Create an expression that you would use to solve the problem below.
2 answers:
The tool was used for 28 minutes
Step-by-step explanation:
We will use simple division to calculate the number for minutes for which the tool was rented
Given
Cost per minute = $0.65
Total cost = $18.20
Let x be the number of minutes
So,
x =
The tool was used for 28 minutes
Keywords: Division, Linear equation
Learn more about division at:
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Answer:
And we can find this probability using the normal standard table or excel:
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 amount of ml 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 using the normal standard table or excel: