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Taya2010 [7]
3 years ago
13

Fill in the table below

Mathematics
1 answer:
pickupchik [31]3 years ago
5 0

Answer:

60_1hrs

30min-?

30 min-1 1/2

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Plz plz plz help me ill give brainliest i just really need help
grin007 [14]

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xvideos

Step-by-step explanation:

4 0
2 years ago
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Their are 5280 feet in 1 mile. How many inches are there in 4 miles
schepotkina [342]

Answer:

21120

Step-by-step explanation:Because you take 5280 and multiply it by 4

7 0
3 years ago
Again ... Commute times in the U.S. are heavily skewed to the right. We select a random sample of 500 people from the 2000 U.S.
VladimirAG [237]

Answer:

We conclude that the mean commute time in the U.S. is less than half an hour.

Step-by-step explanation:

We are given that a random sample of 500 people from the 2000 U.S. Census is selected who reported a non-zero commute time.

In this sample the mean commute time is 27.6 minutes with a standard deviation of 19.6 minutes.

Let \mu = <u><em>mean commute time in the U.S..</em></u>

So, Null Hypothesis, H_0 : \mu \geq 30 minutes      {means that the mean commute time in the U.S. is more than or equal to half an hour}

Alternate Hypothesis, H_A : \mu < 30 minutes     {means that the mean commute time in the U.S. is less than half an hour}

The test statistics that would be used here <u>One-sample t-test statistics</u> as we don't know about population standard deviation;

                           T.S. =  \frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }  ~ t_n_-_1

where, \bar X = sample mean commute time = 27.6 minutes

            s = sample standard deviation = 19.6 minutes

            n = sample of people from the 2000 U.S. Census = 500

So, <u><em>the test statistics</em></u>  =  \frac{27.6 -30}{\frac{19.6}{\sqrt{500} } }  ~ t_4_9_9

                                       =  -2.738

The value of t test statistic is -2.738.

Since, in the question we are not given with the level of significance so we assume it to be 5%. <u>Now, at 5% significance level the t table gives critical values of -1.645 at 499 degree of freedom for left-tailed test.</u>

Since our test statistic is less than the critical value of t as -2.378 < -1.645, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis.</u>

Therefore, we conclude that the mean commute time in the U.S. is less than half an hour.

4 0
3 years ago
Checking for extraneous solutions
jarptica [38.1K]
There is no restriction on the domain because there is a cube root for all real values positive or negative.  So you can solve this as there are no extraneous solutions...

Cube both sides...

2x-4=-8

2x=-4

x=-2

8 0
3 years ago
What is the LCM of 16 and 40 ? 24 and 40 ?
andre [41]

Answer:

80 & 120

Step-by-step explanation:

16×5 & 40×2=80

24×5 & 40×3=120

5 0
3 years ago
Read 2 more answers
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