46! Because 5 times 3 is 15 and the two big rectangles are equal, that’s 15+15. (30) 5x1 is 5 and THERES two equal things like that so 5+5 (10). 3x1 is 3 and THERES also two equal things so add 3+3. (6) add 30+10+6 which makes 46! :)
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Answer:
≈ 18.8 cm
Step-by-step explanation:
The arc length is calculated as
arc = circumference of circle × fraction of circle
The central angle is equal to the arc subtending it, that is 60°
arc = 2πr ×
= 2π × 18 ×
= 36π ×
= 6π ≈ 18.8 cm ( to 1 dec. place )
Answer:
The right options are:
a. The margin of error is 0.632
f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.
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Step-by-step explanation:
<em>The question is incomplete:</em>
<em>Select one or more:</em>
<em>a. The margin of error is 0.632</em>
<em>b. The margin of error is 1264.</em>
<em>C. The margin of error is 0.600.</em>
<em>d. We believe that the true mean time spent on breakfast is between 11.968 and 13.232 minutes.</em>
<em>e. If we take many other samples from this population, 95% of them will have a sample mean that is between 11968 and 13232.</em>
<em>f. There is a 95% chance that the true mean is between 11.968 and 13.232 minutes.</em>
The margin of error can be calculated from the bounds of the confidence interval as:
As the confidence interval is calculated at 95% confidence, we are 95% confident that the true mean is within the calculated interval. We are not 100% confident although (that's why Option d is false).
This interval does not give us information about the sampling distribution (option e is false).