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icang [17]
2 years ago
10

A circle has a circumference of 1,133.54 units.What is the diameter of the circle?

Mathematics
1 answer:
Kaylis [27]2 years ago
7 0

Answer:

361 units

Step-by-step explanation:

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teachers for several classes and a district are told to use a new method for teaching reading while all the other classes use tr
OLEGan [10]
The <u>correct answer</u> is:

Experiment

Explanation:

In an experiment, one group is given a treatment while at least one other group is not.  After the treatment is finished, the results of the group that receive the treatment are compared with the results of the group (or groups) that do not receive the treatment, to determine if the treatment had any effect on the group.

In this problem, the different groups are the classes.  Some classes use the new method, which is the treatment, while other classes do not.  At the end of the year, the reading results of each class are compared to see if the treatment (new method) had any effect.
3 0
3 years ago
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A random sample of 25 statistics examinations was selected. The average score in the sample was 76 with a variance of 144. Assum
Mazyrski [523]

Answer:

99% confidence interval for the population average examination score is between a lower limit of 69.2872 and an upper limit of 82.7128.

Step-by-step explanation:

Confidence interval = mean +/- margin of error (E)

mean = 76

variance = 144

sd = sqrt(variance) = sqrt(144) = 12

n = 25

degree of freedom (df) = n - 1 = 25 - 1 = 24

confidence level (C) = 99% = 0.99

significance level = 1 - C = 1 - 0.99 = 0.01 = 1%

t-value corresponding to 24 df and 1% significance level is 2.797

E = t×sd/√n = 2.797×12/√25 = 6.7128

Lower limit = mean - E = 76 - 6.7128 = 69.2872

Upper limit = mean + E = 76 + 6.7128 = 82.7128

99% confidence interval is (69.2872, 82.7128)

6 0
3 years ago
Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below
sergejj [24]

Answer:

Kerri

calculate z scores z= (x - xbar)/stdev

Kerri = 1.7

Cade = .7

Vincent = 1

Step-by-step explanation:

6 0
2 years ago
PLZ HURRY 30 POINTS!!!!!!
VLD [36.1K]

Answer:

has a slope of 1/3 and passes through the point (-3, 1)

8 0
2 years ago
48 pens are packed in four boxes how many pens are packed in nine boxes ​
katovenus [111]

Answer:

108 pens

Step-by-step explanation:

48/4=x/9

4x=432

x=108

3 0
3 years ago
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