3 years ago

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Mathematics

1 answer:

Nina [5.8K]3 years ago

8 0

Answer:

6cm is 4x by 1 Ilan?? Di mo Alam no

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The clerk at the checkout counter earned $350 in 25 hours.

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Answer: 14 a hour

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Jackson earned 22 out of 25 points on a class project. Determine the percentage grade that he earned by setting up an equivalent

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it would be a 85 percent

Step-by-step explanation:

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Rewrite each expression using the distributive property. Then combine like terms if possible. 2(x+4

Eduardwww [97]

Step-by-step explanation:

Step 1: Multiply the 2 with the X to get 2X.

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In a random sample of 8 people, the mean commute time to work was 33.5 minutes and the standard deviation was 7.2 minutes. A 95

Elina [12.6K]

Answer: Margin of error = 6.58

Confidence interval = (26.91, 40.08)

Step-by-step explanation:

Since we have given that

Sample size n = 8

Sample mean = 33.5 minutes

Population standard deviation = 9.5 minutes

At 95% confidence interval,

α = 0.05

t = 1.96

So, Margin of error is given by

$t\times \dfrac{\sigma}{\sqrt{n}}\\\\=1.96\times \dfrac{9.5}{\sqrt{8}}\\\\=6.58$

Confidence interval would be

Lower limit:

$\bar{x}-6.58\\\\=33.5-6.58\\\\=26.91$

Upper limit:

$\bar{x}+6.58\\\\=33.5+6.58\\\\=40.08$

Hence, the interval would be (26.91, 40.08)

But at standard deviation 7.2 minutes, the confidence interval was (27.5, 39.5)

Confidence interval using the standard normal distribution is wider than the confidence interval using t distribution.

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3 years ago

If the radius of a cylinder is doubled and the height is tripled, what happens to the volume? A) It is multiplied by 6. Eliminat

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A. Imagine the circle has a radius of 3 and height of 9. 3 x 9 = 27/3 is 9. If radius is doubled that’s 6 and height is tripled would make it 27. So 6 x 27 is 162 divided by 3 is 54 and 9 x 6 is 54

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3 years ago