Question 20

1 answer:

5 0

The main advantage of the metric system and it's use is that it Does not require knowledge of math to use it. A person having non or low level of knowledge can use it.

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A projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t^2 640t.

Nataly_w [17]

- A projectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = - 16t² + 640t. After how many seconds does the projectiletake to reach its maximum height? I made the function .

4 0

3 years ago

Which dot plot shows a sample that is most representative of the number of pets in a household?

Dovator [93]

Answer:

you kinda need to show a dot plot for someone to answer your question

Step-by-step explanation:

6 0

4 years ago

In what order should a boolean retrieval system merge the related postings for best query efficiency?

Nonamiya [84]

Answer:

For each n get its posting then AND them

Step-by-step explanation:

1. Lets presume we have multiple n terms

2. We get the posting from each n term

3. We use the function AND and apply it to each n term

4. We start with the tiniest set and we continue from there

5. We have a pair of n terms

6. We get the posting from 1st n

7. We get the posting from 2nd n

8. We apply n1 AND n2

4 0

4 years ago

A battery has a lifetime that is approximately normally distributed with a mean of 600 hours and a standard deviation of 50 hour

miss Akunina [59]

Answer:

A. Your battery is likely defective since such poor performance is extremely unlikely.

Step-by-step explanation:

When the distribution is normal, we use the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

If X is more than two standard deviations from the mean, it is considered an unlikely outcome.

In this question, we have that:

$\mu = 600, \sigma = 50$