An artist wants to reduce the size of a drawing using a scale factor of 3:1. The original drawing has an area of 720 square inch
1 answer:
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Answer:
The profit function is p(x)=700x-1150.
Step-by-step explanation:
The monthly expenses, in dollars, for x months of operation is given by the function
The monthly revenue, in dollars, earned by the bakery is given by the function
The formula for profit:
Subtract the revenue and cost function to find the profit function.
On combining like terms we get
Therefore the profit function is p(x)=700x-1150.
Answer:
A 95% confidence interval estimate of the population mean (average) daily balance of all the checking accounts is $274.32 to $331.68
Step-by-step explanation:
Consider the provided information.
A random sample of 21 checking accounts at the bank are chosen,
That means n=21
df = n-1
df = 21-1=20
We need to Construct and interpret a 95% confidence interval.
Determine t critical value for 95% confidence interval.
0.95=1-α
α=0.05
The sample size is small and it is a two tailed test.
From the t value table confidence interval is 2.086
An average daily balance is $303 and a standard deviation of $63.
Substitute the respective values.
A 95% confidence interval estimate of the population mean (average) daily balance of all the checking accounts is $274.32 to $331.68