3 years ago

8) The diagram shows a sector of the circle with radius 60 cm and the angle at the

1 answer:

5 0

Answer:

251.3274cm

Step-by-step explanation:

L / 240 = C / 2π

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kirza4 [7]

That would be .82 as 82% is 82/100 so that makes the answer .82

8 0

3 years ago

xz_007 [3.2K]

Answer: ($3.532, $4.166)

Step-by-step explanation:

Given : Significance level : $\alpha: 1-0.90=0.10$

Critical value : $z_{\alpha/2}=1.645$

Sample size : n= 157

Sample mean : $\overline{x}=\$\ 3.849$

Standard deviation : $\sigma= \$\ 2.421$

The confidence interval for population mean is given by :_

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$

$\text{i.e. }\$\ 3.849\pm (1.64)\dfrac{2.421}{\sqrt{157}}\\\\\approx\$\ 3.849\pm0.317\\\\=(\$\ 3.849-0.317,\$\ 3.849+0.317)=(\$\ 3.532,\$\ 4.166)$

Hence, the 0% confidence interval for the average tip given at this restaurant = ($3.532, $4.166)

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3 years ago

kirza4 [7]

Center is at (0, 0) and make sure you label it on the diagram
Radius is 5 units
Equation of circle is
(X-0)^2 + (y-0)^2 = 5^2
X^2 + y^2 = 25

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3 years ago

Leno4ka [110]

Length multiplied by Width is Area, or A = L x W. 5/9 x 7/8 is your answer.

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3 years ago

ale4655 [162]

Answer:w is equal or more than 15

Step-by-step explanation:

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3 years ago