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3 years ago

PLEASE HELPPPPPPwhat is a semicirles permitier if the diameter is 4

Mathematics

1 answer:

trapecia [35]3 years ago

6 0

The straight edge of the semicircle is 4 units, as this is this the diameter.

The circumference of the full circle is

C = pi*d = pi*4 = 4pi

which is the distance around the full circle (aka circle's perimeter)

So half of this is 4pi/2 = 2pi

Add this onto the straight edge length to get 4+2pi as the exact distance around the entire semicircle. This includes both straight and curved portions.

If you use the approximation pi = 3.14, then 4+2*pi = 4+2*3.14 = 10.28 is the approximate answer. To get a more accurate answer, use more decimal digits in pi.

---------------------------------------------------------

In summary,

exact answer in terms of pi is 4+2pi units

approximate answer is roughly 10.28 units (using pi = 3.14)

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Complete Question

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Answer:

The alternative hypothesis $H_a : \mu < 15.9$

The test statistics $z = -2.64$

Step-by-step explanation:

From the question we are told that

The population mean value for time citizens remain unemployed is $\mu = 15.9 \ weeks$

The sample size is n = 50

The sample standard deviation is 6.7 weeks.

The sample mean value for time citizens remain unemployed is $\mu = 15.9 \ weeks$

The null hypothesis is $H_o : \mu \ge 15.9$

The alternative hypothesis $H_a : \mu < 15.9$

Generally test statistics is mathematically represented as

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3 years ago

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This question is incomplete, the complete question is;

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Step-by-step explanation:

Given the data in the question;

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2 years ago

PLEASE HELPPPPPPwhat is a semicirles permitier if the diameter is 4​

PLEASE HELPPPPPPwhat is a semicirles permitier if the diameter is 4