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Mathematics

1 answer:

antiseptic1488 [7]2 years ago

5 0

The correct answer would be A. Hope this helps!

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Evaluate the function f(x) = sec(x - pi/2) for x = 0.

Anvisha [2.4K]

$\sec\left(0-\dfrac{\pi}{2}\right)=\sec\left(-\dfrac{\pi}{2}\right)=\dfrac{1}{\cos \left(-\dfrac{\pi}{2}\right)}=\dfrac{1}{0}$

So, the function $f(x)$ for $x=0$ is undefined.

5 0

3 years ago

A therapist wanted to determine if yoga or meditation is better for relieving stress. The therapist recruited 100 of her high-st

schepotkina [342]

Answer: Choice B

There is not convincing evidence because the interval contains 0.

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Explanation:

The confidence interval is (-0.29, 0.09)

This is the same as writing -0.29 < p1-p1 < 0.09

The thing we're trying to estimate (p1-p2) is between -0.29 and 0.09

Because 0 is in this interval, it is possible that p1-p1 = 0 which leads to p1 = p2.

Therefore, it is possible that the population proportions are the same.

The question asks " is there convincing evidence of a difference in the true proportions", so the answer to this is "no, there isn't convincing evidence". We would need both endpoints of the confidence interval to either be positive together, or be negative together, for us to have convincing evidence that the population proportions are different.

5 0

3 years ago

Graph the inequality y> 2x +3

adelina 88 [10]

Graph the inequality y> 2x +3

Solution

Step 1: To graph the inequality, we need to find a few coordinates and form the table.

Step 2: Forming the table.

Let's take x = -1 and find the value of y.

Plug in x = -1 and find the value of y.

y = 2(-1) + 3 = -2 + 3 = 1

When x = -1, the value of y is 1.