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Svetach [21]
3 years ago
6

Someone help me with this question!

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
8 0
The “1/2” caused the parabola to be vertically compressed meaning it got wider.

and the “-2” caused the parabola to move 2 units to the right

Therefore the correct answer should be C.
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azamat
Coterminal angles are found by adding/subtracting 2\pi or 360, so D.
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A CD store sold 3467 CDs in 7 days about the same number of CDs were sold each day how many CDs did the store sell in one day
Novay_Z [31]
About 495 CDs in a single day

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734.8 divided by 1.67
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Write the decimal as a fraction or a mixed number in simplest form.<br> -2.70
Ira Lisetskai [31]

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-2 7/10

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6 0
3 years ago
In a random sample of 8 ​people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.4 minutes. A 90
konstantin123 [22]

Answer:

Margin of Error = 5.4088 ;

Confidence interval = (30.1 ; 40.9)

Interval estimate are almost the same

Step-by-step explanation:

Given that :

Population standard deviation, σ = 9.3

Sample size, n = 8

Xbar = 35.5

Confidence level = 90%

The confidence interval:

Xbar ± Margin of error

Margin of Error = Zcritical * σ/sqrt(n)

Zcritical at 90% = 1.645

Margin of Error = 1.645 * 9.3/sqrt(8) = 5.4088

Confidence interval :

Xbar ± Margin of error

35.5 ± 5.4088

Lower boundary = (35.5 - 5.4088) = 30.0912 = 30.1

Upper boundary = (35.5 + 5.4088) = 40.9088 = 40.9

(30.1 ; 40.9)

T distribution =. (30.5 ; 40.5)

Normal distribution = (30.1, 40.9)

4 0
3 years ago
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