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Sergio039 [100]
2 years ago
7

Write an expression that can be used to find 4x275 using mental math and properties of numbers

Mathematics
2 answers:
Mashutka [201]2 years ago
7 0
(4*200)+(4*70)+(4*5)
Hope this helps
alexira [117]2 years ago
6 0
(4*200)(4*70)(4*56 that is my answer
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If the radius of a spherical rubber ball is 1 1/4 inches what is its volume to the nearest cubic inch
Yuri [45]
? = 4/3 π(1 1/4)
<span>Answer: 8</span>

5 0
3 years ago
The first eight quizzes in this class had average scores of 8,9,9,8,8,9,8,7. This gives a sample mean of 8.25 and a sample stand
alexira [117]

Answer:

<em>Test statistic </em>

<em>               </em>t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }  

            t = <em>1.076</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

Given Mean of the Population (μ) = 8.0

<em>Mean of the sample (x⁻) = 8.25</em>

Given data

                  8,9,9,8,8,9,8,7

Given sample size  n= 8

Given sample standard deviation(S) = 0.661

<u><em>Step(ii):-</em></u>

<em>Null hypothesis : H:  (μ) = 8.0</em>

<em>Alternative Hypothesis :H:(μ) > 8.0</em>

<em>Degrees of freedom = n-1 = 8-1=7</em>

<em>Test statistic </em>

<em>               </em>t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }<em></em>

<em>              </em>t = \frac{8.25 -8.0}{\frac{0.661}{\sqrt{8} } }<em></em>

<em>            t =  1.076</em>

<em>Critical value </em>

<em>                    t₍₇,₀.₀₅₎   = 2.3646</em>

<em>The calculated value   t =  1.076 < 2.3646 at 0.05 level of significance</em>

<em>Null hypothesis is accepted</em>

<em>Test the hypothesis that the true mean quiz score is 8.0 against the alternative that it is not greater than 8.0</em>

<em></em>

3 0
3 years ago
0.1629 nearest tenth (0.1) look at the 0.01 place.
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Answer:

If its asking you to round to the nearest tenths place then its 0.2

remember that if the number you're using to round is 5 or higher  you add 1. If its 4 or lower it stays the same

6 0
3 years ago
A plane has to travel 2,800 miles at an average speed of 560 miles per hour. How many hours will it take to reach its destinatio
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2800/560 = 5

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