It wouldn’t be any of these I don’t think, however I don’t know what the # means.
I thought it would be C = 15 + x(0.20)
Hope this helps
Answer:
The critical value for this hypothesis test is 6.571.
Step-by-step explanation:
In this case the professor wants to determine whether the average number of minutes that a student needs to complete a statistics exam has a standard deviation that is less than 5.0 minutes.
Then the variance will be, 
The hypothesis to determine whether the population variance is less than 25.0 minutes or not, is:
<em>H</em>₀: The population variance is not less than 25.0 minutes, i.e. <em>σ²</em> = 25.
<em>Hₐ</em>: The population variance is less than 25.0 minutes, i.e. <em>σ²</em> < 25.
The test statistics is:
The decision rule is:
If the calculated value of the test statistic is less than the critical value, 
then the null hypothesis will be rejected.
Compute the critical value as follows:
*Use a chi-square table.
Thus, the critical value for this hypothesis test is 6.571.
Answer:
The best estimate for the average temperature in October at 10 a.m. is 73.8 degrees Fahrenheit.
Solution:
Number of hours after 5 a.m.: x
At 10 a.m.→x=10-5→x=5
yˆ=−0.37(5)^2+6.15(5)+52.3
yˆ=−0.37(25)+30.75+52.3
yˆ=−9.25+30.75+52.3
yˆ=73.8
Answer: The best estimate for the average temperature in October at 10 a.m. is 73.8 degrees Fahrenheit.
First, convert the 33% to a real mathematical number. For percents, this is always done by dividing the 33% by 100%, or 33% / 100% = 0.330.
Second, find out what 33% of $2799 is. This is the amount of the sale discount. This is always found by mulitplying 0.330 by the item's cost $2799, like this:
0.330 x $2799 = $923.67.
So for this sale, you'll save $923.67 on this item.
This means, the cost of the item to you is
$2799 - $923.67 = $1875.33.
Alternatively, you can think about it this way. The item is 33% off. This means you'll pay 67.000% of the total cost (100% - 33% = 67.000%).
Now what's 67.000% of the total cost?
0.670 x $2799 = $1875.33.
Just like the result above, the sale price on the item is $1875.33.
Hope this helps you on your assignment! :)
17 because 100 - 55 = 45 14/45%= 31 31 times 55%= 17
