Answer:
The sample proportion of printers used in small business is:
The 95% confidence interval for the population proportion of printers that are used in small businesses is:
Where:
is the critical value at 0.05 significance level
Therefore, the 95% confidence interval for the population proportion of printers that are used in small businesses is (0.245 , 0.469)
Answer:
a
Step-by-step explanation:
Answer: 3 hours and 25 minutes
Step-by-step explanation:
We need to use simple division to solve the problem. The number of students in the painting class this month is 14.
It is said that each student pays $12 for class and $28 for materials. The total amount paid by each student can be calculated by adding both of them. We know that the total amount this month is $560, we need to find the number of students in the class. Let us consider the number of students in the class to be x, and multiply the total amount per student to x and equate it to 560.
(12+28)x=560
40x=560
x=560/40=14
Therefore the number of students in the painting class is 14.
Learn more about division here:
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Answer:
$38
Step-by-step explanation:
I solved this by doing a proportion, 41.04/108 = x/100 to find the original price before the 8% tax. To solve this proportion you have to isolate the variable, so you would do the cross product and multiply (41.04 x 100) and have that equal to 108x. So then because you have 108x = 4104, isolate x by dividing by 108 and you get 38, thus $38.
You can also check your work by multiplying 38 by 0.08 to find the amount of sales tax added, and if you do this you will get the value $41.04.
