Please hurry, (3x+1)+(2x+9)=180 What is the sum of "x"?
2 answers:
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The amount should he expect the pizza shop to tell him as his total charge will be $7122. It is obtaining by adding the service tax for the pizza and the delivery.
<h3>What is service tax?</h3>A tax on services that is provided by the vendors on the customers or the consumer is called as the service tax.
The given data in the problem is;
large pizza costs = $10.99
Number of pizza(n)=6
Sales tax = 8%
Delivery charges=$3.00The total charge is found as;
Total charge = n × cost of each pizza+ delivery charge +service tax
Hence, the value of total charge will be $71.22 .
To learn more about the service tax, refer to the link;
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Answer:
And rounded up we have that n=1068
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
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 population proportion have the following distribution
Solution to the problem
In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by and
. And the critical value would be given by:
The margin of error for the proportion interval is given by this formula:
(a)
And on this case we have that and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
We don't have a prior estimation for the proportion so we can use 0.5 as an approximation for this case
And replacing into equation (b) the values from part a we got:
And rounded up we have that n=1068