2y-16=2x in slope intercept form
1 answer:
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Answer:
61 commuters must be randomly selected to estimate the mean driving time of Chicago commuters.
Step-by-step explanation:
Given : We want 95% confidence that the sample mean is within 3 minutes of the population mean, and the population standard deviation is known to be 12 minutes.
To find : How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters?
Solution :
At 95% confidence the z-value is z=1.96
The sample mean is within 3 minutes of the population mean i.e. margin of error is E=3 minutes
The population standard deviation is s=12 minutes
n is the number of sample
The formula of margin of error is given by,
Substitute the value in the formula,
Squaring both side,
Therefore, 61 commuters must be randomly selected to estimate the mean driving time of Chicago commuters.
The length of the unknown side is 16 meters
<h3>What is a right triangle?</h3>A right triangle is a triangle that has one of its angles to be 90 degrees
The length of the unknown side is calculated using the following Pythagoras theorem.
Evaluate the exponents
Collect like terms
Evaluate the like terms
Take the square root of both sides
Hence, the length of the unknown side is 16 meters
Read more about Pythagoras theorem at: