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4 years ago

a central angle of circle of radius 50cm intercept an arc of 10 cm .Express central angle in radian n in degree

Mathematics

1 answer:

Elodia [21]4 years ago

7 0

Answer:

11.7 degrees approximated to 12 degrees

Step-by-step explanation:

couldn't send the answer as 1 photo

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A 90% confidence interval for the mean height of students

Westkost [7]

Answer:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

Step-by-step explanation:

Let X the random variable of interest and we know that the confidence interval for the population mean $\mu$ is given by this formula:

$\bar X \pm t_{\alpha/2} \frac{s}{\sqrt{n}}$

The confidence level on this case is 0.9 and the significance $\alpha=1-0.9=0.1$

The confidence interval calculated on this case is $60.128 \leq \mu \leq 69.397$

The margin of error for this confidence interval is given by:

$ME =t_{\alpha/2} \frac{s}{\sqrt{n}}$

Since the confidence interval is symmetrical we can estimate the margin of error with the following formula:

$ME = \frac{Upper -Lower}{2}$

Where Upper and Lower represent the bounds for the confidence interval calculated and replacing we got:

$ME= \frac{69.397-60.128}{2}= 4.6345 \approx 4.635$

And the best answer on this case would be:

b) m = 4.635

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3 years ago

Distance: (-2,7) and (2,-5)

scZoUnD [109]

Does it say anything about slope?

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3 years ago

A desk is on sale for $380 which is 20% of the original price. Which equation can be used to determine the amount of money saved

elena-s [515]

Answer:

S = 380 - 380*80%

Step-by-step explanation:

Given:

The original price of the desk: $380
Discount: 20%

So, the new price of the desk after discounting is:

380(100% - 20%)

= 380*80%

= 304$

The amount of money saved: 380 - 304 = 76$

Hence, the equation can be used to determine the amount of money saved is:

Saving = 380 - 380*80%

Hope it will find you well.

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0.618 divided by 1.03 will equal to 0.6

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Anton [14]

Answer:

The sum of four and a number multiplied by two

Step-by-step explanation:

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a central angle of circle of radius 50cm intercept an arc of 10 cm .Express central angle in radian n in degree​

a central angle of circle of radius 50cm intercept an arc of 10 cm .Express central angle in radian n in degree