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Answer:
1. Which statement would prove there is a. 2. There are two rectangles. Rectangle WXYZ has a length of 21 to two sides of another triangle, then the Which statement will always be true of the 6. The diagram shows the side lengths of two similar triangles. entre 15 km.
Step-by-step explanation:
First we will evaluate: ( substitution: u = x² - y², du = - 2 y dy )

=

( than plug in x and 0 )
=

=
= 1/3 x³ ( then another integration )

= 1/3 * 1/4 =
1/12
Answer:
The 99% confidence interval for the fraction of US adult Twitter users who get some news on Twitter is (0.4872, 0.6018). It means that we are 99% sure that the true proportion of US adult Twitter users who get some news on Twitter is between 0.4872 and 0.6018.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of
, and a confidence level of
, we have the following confidence interval of proportions.

In which
z is the zscore that has a pvalue of
, and s is the standard error.
54% of US adult Twitter users get at least some news on Twitter.
This means that 
The standard error for this estimate was 2.4%
This means that 
99% confidence level
So
, z is the value of Z that has a pvalue of
, so 
The lower bound is:

The upper bound is:

The 99% confidence interval for the fraction of US adult Twitter users who get some news on Twitter is (0.4872, 0.6018). It means that we are 99% sure that the true proportion of US adult Twitter users who get some news on Twitter is between 0.4872 and 0.6018.
Answer:
B. Add 2/5 to both sides
Step-by-step explanation:
Yuu have to add because it says subtract. inverse operations