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2 years ago

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23. A grid shows the positions of a subway stop and your house. The subway stop is located at (-5, 2) and your house is located

at (-9, 9). What is the distance, to the nearest unit, between your house and the subway stop?

1 answer:

Sindrei [870]2 years ago

7 0

(-5, 2)(-9,9)
D = √( (x2 - x1)^2 + (y2 - y1)^2 )
D = √( (-9+5)^2 + (9 - 2)^2 )
D =√( (-4)^2 + (7)^2 )
D = √( 16 + 49 )
D = √65
D = 8

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What is the measure in radians for the central angle of a circle whose radius is 8 cm and intercepted arc length is 7.2 cm?

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central angle of a circle whose radius is 8 cm and intercepted arc length is 7.2 cm is 0.9 radians

Step-by-step explanation:

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<h2><u>Answer with explanation</u>:</h2>

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sample size : n= 65

degree of freedom : df=n-1=64

sample mean : $\overline{x}=19.5$

sample standard deviation : s= 5.2

Since , the population standard deviation is not given , so we apply t-test.

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