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3 years ago

What is the product of (3.8 x 106) and (6 x 103)?

Mathematics

1 answer:

Troyanec [42]3 years ago

6 0

It would be A. 2.28 x 10^9

You don’t multiply exponents you only add them for now

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Plz help I will give brainliest What is the value of x in this problem 97x+14=13.8

sammy [17]

X= -1/485 (-0.00206)

8 0

3 years ago

Because of staffing decisions, managers of the Gibson-Marion Hotel are interested in the variability in the number of rooms occu

olchik [2.2K]

Answer:

a) $s^2 =30^2 =900$

b) $\frac{(19)(30)^2}{30.144} \leq \sigma^2 \leq \frac{(19)(30)^2}{10.117}$

$567.28 \leq \sigma^2 \leq 1690.224$

c) $23.818 \leq \sigma \leq 41.112$

Step-by-step explanation:

Assuming the following question: Because of staffing decisions, managers of the Gibson-Marimont Hotel are interested in the variability in the number of rooms occupied per day during a particular season of the year. A sample of 20 days of operation shows a sample mean of 290 rooms occupied per day and a sample standard deviation of 30 rooms

Part a

For this case the best point of estimate for the population variance would be:

$s^2 =30^2 =900$

Part b

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The degrees of freedom are given by:

$df=n-1=20-1=19$

Since the Confidence is 0.90 or 90%, the significance $\alpha=0.1$ and $\alpha/2 =0.05$ , the critical values for this case are:

$\chi^2_{\alpha/2}=30.144$

$\chi^2_{1- \alpha/2}=10.117$

And replacing into the formula for the interval we got:

$\frac{(19)(30)^2}{30.144} \leq \sigma^2 \leq \frac{(19)(30)^2}{10.117}$

$567.28 \leq \sigma^2 \leq 1690.224$

Part c

Now we just take square root on both sides of the interval and we got:

$23.818 \leq \sigma \leq 41.112$

5 0

3 years ago

Decompose 2/6 into 4 equal lengths

anyanavicka [17]

I'm not 100% sure, but I'm pretty sure it's 1/12, 1/12, 1/12, 1/12

4 0

3 years ago

The figure has ____ lines of symmetry. A. 0 B. 4 C. 6 D. 8

Olenka [21]

A.) Scalene Triangle has no Lines of Symmetry
B.) A Square (4 sides) has 4 Lines of Symmetry
C.) A Regular Hexagon (6 sides) has 6 Lines of Symmetry
D.) A Regular Octagon (8 sides) has 8 Lines of Symmetry

7 0

3 years ago

Which expression is equivalent to 5x + 7y

astra-53 [7]

7y + 5x is another way to write it, is there anything specific you're looking for

3 0

3 years ago