There is exactly one x-intercept. Then the correct option is A.
<h3>What is a function?</h3>
A statement, principle, or policy that creates the link between two variables is known as a function.
The continuous function that generated the following table of values will be
x -3 0 1 5 11
y 4 -3 2 0 7
The value of y at x-intercept will be 0.
Then there is exactly one x-intercept.
Then the correct option is A.
More about the function link is given below.
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Note that both 5 and 4 are exponents, and their product is 5*4=20, or 4*5=20. Thus,
(3^5)^4 is equal to (3^4)^5
Review:
(a to the power b)to the power c = a to the power bc.
Thus, (3 to the power 5)^4 = 3^20; the same is true if you reverse the positions of the 5 and the 4.
Answer:
Due to the larger sample size, the confidence interval of the second group will have greater precision for estimating the population mean.
Step-by-step explanation:
Margin of error of a confidence interval:
The equation for the margin of error of a confidence interval has the following format:
In which z is related to the confidence level, 
is the standard deviation of the population and n is the size of the sample.
From this, we can infer that a larger size leads to a greater precision of the interval, that is, a lesser margin of error.
In this question:
The sample from the first group survey has 49 data values, and from the second group has 81.
Due to the larger sample size, the confidence interval of the second group will have greater precision for estimating the population mean.
The answer is c, or 12. 3 times 7 is 21, minus nine is 12
