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MariettaO [177]
3 years ago
14

6) A jet travels 480 miles in 2 hours. At this rate, how far could the jet fly in

Mathematics
2 answers:
Sveta_85 [38]3 years ago
7 0
I need help on this too
Arte-miy333 [17]3 years ago
4 0

Answer:

1,920 is how far the jet travels in 8 hours, the rate of the jet is 240 meaning it would travel 240 miles in 1 hour,

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How many batches of raisin granola bars can Ines make if she has 8/3 cups of raisins and each batch requires 2/3 cup of raisins?
iren2701 [21]
4 batches:

2/3 • 4 = 8/3

2/3 + 2/3 + 2/3 + 2/3 = 8/3

2/3 = 0.666666666666667

0.666666666666667 • 4 = 2.666666666666667

8/3 = 2.666666666666667






8 0
3 years ago
57 toys are split into groups of 4 toys. What question do we need to answer here? pls answer quick! this test is already missing
Ilia_Sergeevich [38]

Answer:

im thinking its how many toys you need in each group?

Step-by-step explanation:

8 0
3 years ago
A group of friends go out to breakfast the total bill including tax is $33 with the tax on the meal is 7% and a 15% tip is left
RSB [31]
The answer is 25.74$ because 7% of the 33$ is 2.31$ and the tip which 15% is 4.95$ so if you subtract all that it come out to 25.74$
4 0
3 years ago
Kim's weekly pay is two thirds of Alicia's.Together they earn $600 per week
garik1379 [7]
A + k = 600
k = 2/3a

a + 2/3a = 600
3/3a + 2/3a = 600
5/3a = 600
a = 600 * 3/5
a = 1800/5
a = 360

k = 2/3a
k = 2/3(360)
k = 720/3
k = 240

so Kim's pay is $ 240 and Alicia's pay is $ 360
7 0
3 years ago
What is the p-value? -- Researcher Jessie is studying how the fear of going to the dentist affects an adult's actual number of v
Vesnalui [34]

Answer:

Two, one for the 14 responses (number of visits) by the adults who fear going to the dentist and one for the 31 responses (number of visits) by the adults who do not fear going to the dentist.

Step-by-step explanation:

Hello!

1)

You want to test if the average visits to the dentist of people who fear to visit it are greater than the average visits of people that don't fear it.

In this case, the statistic to use is a pooled Student t-test. The reason I've to choose this test is that one of your sample sizes is small (n₁= 14) and the t-test is more accurate for small samples. Even if the second sample is greater than 30, if both variables are normally distributed, the pooled t-test is the one to use.

H₀: μ₁ = μ₂

H₁: μ₁ > μ₂

α: 0.10

t=<u> (X₁[bar]-X₂[bar]) - (μ₁ - μ₂)</u> ~ t_{n₁+n₂-2}

        Sₐ√(1/n₁+1/n₂)

Where

X₁[bar] and X₂[bar] are the sample means of both groups

Sₐ is the pooled standard deviation

This is a one-tailed test, you will reject the null hypothesis to big numbers of t. Remember: The p-value is defined as the probability corresponding to the calculated statistic if possible under the null hypothesis (i.e. the probability of obtaining a value as extreme as the value of the statistic under the null hypothesis), and in this case, is also one-tailed.

P(t_{n₁+n₂-2} ≥ t_{H0}) = 1 - P(t_{n₁+n₂-2} < t_{H0})

Where t_{H0} is the value of the calculated statistic.

Since you didn't copy the data of both samples, I cannot calculate it.

2)

Well there was one sample taken and separated in two following the criteria "fears the dentist" and "doesn't fear the dentist" making two different samples, so this is a test for two independent samples. To check if both variables are normally distributed you need to make two QQplots.

I hope it helps!

3 0
3 years ago
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