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natita [175]
3 years ago
15

Rectangle ABCD has four right angles. What is the sum of its angle measures?

Mathematics
2 answers:
const2013 [10]3 years ago
8 0

Answer:

360 degrees

Step-by-step explanation:

olga nikolaevna [1]3 years ago
7 0

Answer:

360 degrees total, 90 degrees each

Step-by-step explanation:

a rectangle's angles add up to 360 degrees, so if you divide 360 by 4, each angle is 90 degrees and all right angles are equal to 90 degrees

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The operations manager of a large production plant would like to estimate the mean amount of time a worker takes to assemble a n
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Answer:

(15,595, 16,805)

Step-by-step explanation:

We have to:

m = 16.2, sd = 3.75, n = 150

m is the mean, sd is the standard deviation and n is the sample size.

the degree of freedom would be:

n - 1 = 150 - 1 = 149

df = 149

at 95% confidence level the t is:

alpha = 1 - 95% = 1 - 0.95 = 0.05

alpha / 2 = 0.05 / 2 = 0.025

now well for t alpha / 2 (0.025) and df (149) = t = 1,976

the margin of error = E = t * sd / (n ^ (1/2))

replacing:

E = 1,976 * 3.75 / (150 ^ (1/2))

E = 0.605

The 95% confidence interval estimate of the popilation mean is:

m - E <u <m + E

16.2 - 0.605 <u <16.2 + 0.605

15,595 <u <16,805

(15,595, 16,805)

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Answer:

Step-by-step explanation:

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Answer:

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