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Nuetrik [128]
3 years ago
15

Solve this problem.

Mathematics
1 answer:
nadezda [96]3 years ago
6 0
The answer is No, there is not a 100% chance of rain on the weekend.
To explain and understand this write out all the possibilities.
R = rain and 0 = none

R, R
R, 0
0, R
0, 0

as you can see, there is 3/4 chance of rain on the weekend with 1/4 chance no rain
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How would you read this inequality? Answer in a sentence. x<21
Lubov Fominskaja [6]

Answer:

x is less than twenty one

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Charlie walked a distance of 500 meters to school. It took him 5 minutes to arrive at school from home. What is his average spee
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Answer:

100 meters per minute

Step-by-step explanation:

Find his average speed by dividing the distance he walked by the number of minutes it took him:

500/5

= 100

So, his average speed was 100 meters per minute

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A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a
laila [671]

Complete Question

A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a margin of error of ±5% with 90% confidence, and we do not have any prior knowledge about the proportion who might support the law. How many people need to be included in the sample?

Round your answer up to the nearest integer.

sample size = _____

Answer:

The sample size is n = 271    

Step-by-step explanation:

From the question we are told that  

   The margin of error is  E = 5% = 0.05

Generally given that there was no prior knowledge about the proportion of who might support the law, we will assume the sample proportion to be  

     \^ p =  0.5

From the question we are told the confidence level is  90% , hence the level of significance is    

      \alpha = (100 - 90 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.645

Generally the sample size is mathematically represented as  

    n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )

=>   n = [\frac{1.645 }{0.05} ]^2 * 0.5 (1 - 0.5 )

=>   n = 271    

5 0
3 years ago
3x + 2 = 14 what number makes this true?<br> A. 1<br> B. 2<br> C. 4<br> D. 6
Ksenya-84 [330]

Answer:

4

Step-by-step explanation:

3*4+2=14

12+2=14

14=14

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3 years ago
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