your answer should be D because you have to multiply 3.14 times 21 times 7 to get 461.58
4-2 = 2-1
You can do the evaluating part.
Answer:
The cost of each drink is $1.5
Step-by-step explanation:
Let us represent
The cost of snacks = x
The cost of drinks = y
50 snacks and 180 drinks will sell for $320
Hence:
50x + 180y = 320....... Equation 1
75 snacks and 100 drinks will sell for $225.
Hence:
75x + 100y = 225....... Equation 2
Combining both Equations together
50x + 180y = 320....... Equation 1
75x + 100y = 225....... Equation 2
Multiply Equation 1 by 75 and Equation 2 by 50 to eliminate x
3750x + 13500y = 24000..... Equation 3
3750x + 5000y = 11250....... Equation 4
Subtract Equation 4 from Equation 3
8500y = 12750
y = 12750/8500
y = $1.5
Therefore, the cost of each drink is $1.5
The sample size of 36 will produce the widest 95% confidence interval when estimating the population parameter option (b) is correct.
<h3>What are population and sample?</h3>
It is described as a collection of data with the same entity that is linked to a problem. The sample is a subset of the population, yet it is still a part of it.
We have:
A sample has a sample proportion of 0.3.
Level of confidence = 95%
At the same confidence level, the larger the sample size, the narrower the confidence interval.
As we have a 95% confidence interval the sample size should be lower.
The sample size from the option = 36 (lower value)
Thus, the sample size of 36 will produce the widest 95% confidence interval when estimating the population parameter option (b) is correct.
Learn more about the population and sample here:
brainly.com/question/9295991
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