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3 years ago

Round 9 2/4 to the nears whole number

1 answer:

6 0

9 and 2/4 can be written as 9.5 in decimals. We usually round 5 up, so we would round it to 10.

if it was 9.4 we would round it down to 9.

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Two friends are reading the same book. Amy can read 3 pages per minute, and she has already read 9 pages. Sam, who has a reading

Daniel [21]

Amy: (3 pages/min)(x min) + 9 pages
Sam: (2 pages/min)(x min) + 47 pages

Equate these: 3x+9 = 2x + 47

Then x = 38. The two friends will have covered the same number of pages after 38 minutes. How many pages would that be? 3(38)+9 = 123 pages.

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4 years ago

WILL GIVE BRAINLIEST PLEASE HELP A snake dives towards deeper water at a rate of 14 inches per second. If the snake continues at

Zinaida [17]

Answer:

Step-by-step explanation:

It's asking to see how far it will go in 6 seconds, and it's travelling downward.

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3 years ago

What is the Surface area of a square pyramid if

Tatiana [17]

SA= 108 m^2 aND the formula for surface area is SA=2bs+b^2

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4 years ago

How to find the length

Zinaida [17]

Answer:

1. √32

2. 4

3. 5

4. √29

5. √10

6. 5√2

Step-by-step explanation:

Use Pythagoras

4 0

3 years ago

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting. It is

yan [13]

Answer:

No, there is not sufficient evidence to support the claim that the bags are underfilled

Step-by-step explanation:

A manufacturer of potato chips would like to know whether its bag filling machine works correctly at the 434 gram setting.

This means that the null hypothesis is:

$H_{0}: \mu = 434$

It is believed that the machine is underfilling the bags.

This means that the alternate hypothesis is:

$H_{a}: \mu < 434$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

434 is tested at the null hypothesis:

This means that $\mu = 434$

A 9 bag sample had a mean of 431 grams with a variance of 144.

This means that $X = 431, n = 9, \sigma = \sqrt{144} = 12$

Value of the test-statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{431 - 434}{\frac{12}{\sqrt{9}}}$

$z = -0.75$

P-value of the test:

The pvalue of the test is the pvalue of z = -0.75, which is 0.2266

0.2266 > 0.01, which means that there is not sufficient evidence to support the claim that the bags are underfilled.

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3 years ago