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taurus [48]
2 years ago
13

A cyclist travels at 10 km/hr for 2 hours and then at 13 km/hr for 1 hour.

Mathematics
1 answer:
andrew11 [14]2 years ago
3 0
Answer:11km/hr
Step by step explanation
In 1hr a cyclist travels 10 km so multiply 10 by 2 then he travels 13 km in 1 hour so keep it the same add 10(2)+13 to get 33 it took him 3 hrs in total to travel this distance so you must then divide 33 by 3 and you get average speed 11 km/hr
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Increasing the sample size while keeping the same confidence level has what effect on the margin of error? A. Increases the marg
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Answer:

C. Decreases the margin of error and hence increases the precision

Step-by-step explanation:

If we select a sample by Simple Random Sampling in a population of “infinite” size (a population so large that we do not know its size exactly), then the margin of error is given by

\bf E=\frac{ZS}{\sqrt{n}}

where  

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<em>S = The estimated standard deviation of the population </em>

<em>n = the size of the sample. </em>

As we can see, since n is in the denominator of the fraction and the numerator is kept constant, the larger the sample size the smaller the margin of error, so the correct choice is:

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3 years ago
If B is the midpoint of AC, and AC=8x-20. Find BC<br> AB=3x-1<br> Show all work
exis [7]
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now , since B is the midpoint of AC, this means that AB=BC
therefore,
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sashaice [31]

Answer:

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Step-by-step explanation:

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Solution

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First remove parentheses.

Remember, abx is the same as 1abx.

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3 years ago
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The answer is 10 7/10
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Bas_tet [7]

Answer

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Step-by-step explanation:

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