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Archy [21]
3 years ago
10

Evaluate seven pi without a calculator

Mathematics
1 answer:
lilavasa [31]3 years ago
5 0
Hello!

To evaluate this without a calculator, let's multiply 7 and 3.14 (the approximation for pi).

7
3.14
______
21.98 (Rounds to 22)

21.98 is your approximate answer. Hope I helped! :3


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Which of the following objects is best described by the term line segment?
Ne4ueva [31]
A line segment is a part of a line that is bounded by two distinct end points, and contains every point on the line between its endpoints. ... When the end points both lie on a curve such as a circle.
6 0
2 years ago
A researcher was interested in comparing the resting pulse rates of people who exercise regularly and people who do not exercise
DiKsa [7]

Answer:

We Reject H₀ if t calculated > t tabulated

But in this case,

0.83 is not greater than 2.056

Therefore, we failed to reject H₀

There is no difference between the mean pulse rate of people who do not exercise and the mean pulse rate of people who do exercise.

Step-by-step explanation:

Refer to the attached data.

The Null and Alternate hypothesis is given by

Null hypotheses = H₀: μ₁ = μ₂

Alternate hypotheses = H₁: μ₁ ≠ μ₂

The test statistic is given by

$ t = \frac{\bar{x}_1  - \bar{x}_2}{\sqrt{\frac{s_1^2}{n_1} + \frac{s_2^2}{n_2} } }  $

Where \bar{x}_1 is the sample mean of people who do not exercise regularly.

Where \bar{x}_2 is the sample mean of people who do exercise regularly.

Where s_1 is the sample standard deviation of people who do not exercise regularly.

Where s_2 is the sample standard deviation of people who do exercise regularly.

Where n_1 is the sample size of people who do not exercise regularly.

Where n_2 is the sample size of people who do exercise regularly.

$ t = \frac{72.7  - 69.7}{\sqrt{\frac{10.9^2}{16} + \frac{8.2^2}{12} } }  $

t = 0.83

The given level of significance is

1 - 0.95 = 0.05

The degree of freedom is

df = 16 + 12 - 2 = 26

From the t-table, df = 26 and significance level 0.05,

t = 2.056 (two-tailed)

Conclusion:

We Reject H₀ if t calculated > t tabulated

But in this case,

0.83 is not greater than 2.056

Therefore, We failed to reject H₀

There is no difference between the mean pulse rate of people who do not exercise and the mean pulse rate of people who do exercise.

4 0
3 years ago
What’s the answer to this questions ?
DochEvi [55]

Answer:

60 degress

Step-by-step explanation:

180-80=120

120/2=60

6 0
3 years ago
Is 5.78778778 a rational or irrational number? Explain
Bumek [7]
Hello There!

It is rational as it can be written as a fraction and had a pattern to it.

Hope This Helps You!
Good Luck :)
6 0
3 years ago
What is the answer for these problems?
givi [52]
A. 16^{5} 

C. 4^{5}

i don't know b. tho
5 0
3 years ago
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