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laiz [17]
2 years ago
15

The rays OM , ON , and OP in the figure, coincide at time t=0. At the same instant of time OM and OP rotate in the plane about p

oint O in opposite directions while ON remains fixed. With respect to ON , segment OM rotates at constant rate of 3° per second and OP , at 6° per second. What is the smallest positive value of t, in seconds, for which segments OM and OP will coincide? When t=30 min, how many more revolutions does segment OP complete than segment OM ?
Mathematics
1 answer:
Lilit [14]2 years ago
4 0
OM and OP will coincide a second time after 120 seconds. You could visualize it as ray OP moving at 3 degrees/second relative to OM.
Using this visualization, we find that OM makes 30*60*3/360 rotations (minutes * 60 * rotational speed/360 degrees in a rotation), which is 15, and that OP makes 30*60*6/360 or 30 rotations, which is 15 more than OM.
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1000+1.96\frac{2}{\sqrt{4}}=1001.96    

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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Solution to the problem

The confidence interval for the mean is given by the following formula:  

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)  

Since the Confidence is 0.95 or 95%, the value of \alpha=0.05 and \alpha/2 =0.025, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.025,0,1)".And we see that z_{\alpha/2}=1.96

Now we have everything in order to replace into formula (1):

1000-1.96\frac{2}{\sqrt{4}}=998.04    

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Write the first five terms of the geometric sequence in which a1=64 and the common ratio is 5/4
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Remember that finding terms in a geometric sequence is done by multiplying the previous term by a common ratio r. For example, we can say:

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We have a_1 = 64. To find a_2, let's multiply this term by \frac{5}{4}:

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Answer:

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Step-by-step explanation:

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