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4 years ago

Solve for "x" in the circle shown in the illustration below?

Mathematics

1 answer:

dmitriy555 [2]4 years ago

5 0

Answer is D.x=9
5x+3+6x+5+8x+1=180
now solve for 'x'
Hope this help

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Mr. Good Wrench advertises that a customer will have to wait no more than 30 minutes for an oil change. A sample of 26 oil chang

Andru [333]

Answer:

The 90% confidence interval for the population standard deviation waiting time for an oil change is (3.9, 6.3).

Step-by-step explanation:

The (1 - α)% confidence interval for the population standard deviation is:

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

The information provided is:

n = 26

s = 4.8 minutes

Confidence level = 90%

Compute the critical values of Chi-square as follows:

$\chi^{2}_{\alpha/2, (n-1)}=\chi^{2}_{0.10/2, (26-1)}=\chi^{2}_{0.05, 25}=37.652$

$\chi^{2}_{1-\alpha/2, (n-1)}=\chi^{2}_{1-0.10/2, (26-1)}=\chi^{2}_{0.95, 25}=14.611$

*Use a Chi-square table.

Compute the 90% confidence interval for the population standard deviation waiting time for an oil change as follows:

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

$=\sqrt{\frac{(26-1)\times 4.8^{2}}{37.652}}\leq \sigma\leq \sqrt{\frac{(26-1)\times 4.8^{2}}{14.611}}\\\\=3.9113\leq \sigma\leq 6.2787\\\\\approx 3.9 \leq \sigma\leq6.3$

Thus, the 90% confidence interval for the population standard deviation waiting time for an oil change is (3.9, 6.3).

3 0

3 years ago

Wei is standing in wavy water and notices the depth of

dexar [7]

Answer:

see the attachment

Step-by-step explanation:

The function can be ...

D(t) = A +Bcos(C(t-p))

where A is the average depth (55+12)/2 = 33.5 cm,

B is the peak deviation from average, 55 -33.5 = 21.5 cm,

C is the horizontal scale factor (2π/T) = (2π/3) for a period (T) of 3 seconds,

and p is the phase offset, given as 1.1 seconds.

The function is ...

D(t) = 33.5 +21.5cos(2π/3·(t -1.1))

5 0

3 years ago

Read 2 more answers

What is greater 34/18 or 1 5/6

navik [9.2K]

The second one is correct

4 0

3 years ago

Read 2 more answers

Select the correct answer.

ss7ja [257]

Answer:

Step-by-step explanation:

because x=9

3 0

3 years ago

Algebra question please help

Oksana_A [137]

D. 15s +80t less than or equal to 4

hope that this helped you hon :)

4 0

3 years ago