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ozzi
3 years ago
14

Which of the following numbers are square numbers?

Mathematics
1 answer:
Zina [86]3 years ago
4 0

Answer:

9

Step-by-step explanation:

9 is the only number that has a whole number square root, 3.

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A courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the
a_sh-v [17]

Answer:

Probability that the sample proportion will be less than 0.03 is 0.10204.

Step-by-step explanation:

We are given that a courier service company wishes to estimate the proportion of people in various states that will use its services. Suppose the true proportion is 0.04.

Also, 469 are sampled.

<em>Let </em>\hat p<em> = sample proportion</em>

The z-score probability distribution for sample proportion is given by;

              Z = \frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion

           p = true proportion = 0.04

           n = sample size = 469

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) 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.

So, probability that the sample proportion will be less than 0.03 is given by = P( \hat p < 0.03)

       P( \hat p < 0.03) = P( \frac{ \hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } } < \frac{0.03-0.04}{\sqrt{\frac{0.03(1-0.03)}{469} } } ) = P(Z < -1.27) = 1 - P(Z \leq 1.27)

                                                                      = 1 - 0.89796 = 0.10204

Now, in the z table the P(Z \leq x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 1.27 in the z table which has an area of 0.89796.

Therefore, probability that the sample proportion will be less than 0.03 is 0.10204.

5 0
3 years ago
If at the beginning of july Minh sweeps up 80 grams of sand each day how much will she have at the end of july
Annette [7]

Answer: 2,480 grams of sand

Step-by-step explanation:

There are 31 days in July.

Minh sweeps up 80 grams every day in July so at the end of July, Minh should have:

= Number of days * Sand per day

= 31 * 80

= 2,480 grams of sand

8 0
3 years ago
HELP 5 STAR RATING ADN BRAINLY IF SOLVED!
alexandr402 [8]
It is $84.6. You multiply 1.6 by 13 which equals $20.8. Then you multiply 3.1 by 14 which equals $43.4. Then you multiply 1.2 by 17 which equals $20.4. Add them together and you get $84.6. 

Hope this helps:)<span />
5 0
3 years ago
Read 2 more answers
Help i need help please
solong [7]

Answer:

hope it is correct

Step-by-step explanation:

i think it is more than, can , cannot, and required

7 0
3 years ago
What is the length of the line?
Lelu [443]
6cm or (6,1)

If ur talking about vectors It’s (6,1)
6 0
2 years ago
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