Answer:
The first one is correct.
Step-by-step explanation:
-3.5 is inside of the shaded area of the line.
I hope this helps.
Answer D: The graph increases as x goes to -infinity and decreases as x goes to infinity
Answer: A confidence interval for the mean cost (in dollars) for one shipment of vases = (49,59)
Step-by-step explanation:
Confidence interval for mean: Mean ± Margin of error
Given: The online store found the mean wholesale cost of one shipment of vases was ĉ = 54 dollars, with a margin of error of 5 dollars.
A confidence interval for the mean cost (in dollars) for one shipment of vases
Hence, a confidence interval for the mean cost (in dollars) for one shipment of vases = (49,59)
Answer:
![\sqrt[4]{81} = {( {3}^{4}) }^{ \frac{1}{4} }](https://tex.z-dn.net/?f=%20%5Csqrt%5B4%5D%7B81%7D%20%20%3D%20%20%7B%28%20%7B3%7D%5E%7B4%7D%29%20%7D%5E%7B%20%5Cfrac%7B1%7D%7B4%7D%20%7D%20)
Step-by-step explanation:
it's obvious that 3·3·3·3=81
or you can do the prime factorization of 81
Using proportions, it is found that 66 people in the survey worked on election day.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
For this problem, the amounts of people who worked are:
Hence the total amount is given by:
0.64 x 50 + 0.4 x 85 = 66.
66 people in the survey worked on election day.
More can be learned about proportions at brainly.com/question/24372153
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