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3 years ago

PLEASE ANSWER THESE 2 QUESTIONS ASAP

1 answer:

5 0

For the first question, it's 20/60 (if it's a leap year, but tht doesn't rlly matter). That can be reduced to 1/3. However, there's also 5/60 which is reduced to 1/12. Since 1/3 is bigger than 1/12, he shouldn't expect to be able to get around at least 5 of the days. (But, I'm not exactly sure if this answer is correct. Just guess; there's 50% you'll get it correct and 50% you won't.)

For the second question, you first have to convert '56 out of 64 days' thing to percentage. You do 56/64 x 100 which is 5600/64. That equals to 87.5%. Since 90 > 87.5, the train is more reliable.

THE END

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How Are the Suns rays like mathematical rays

aleksklad [387]

Suns rays go from one point and go outwards and mathematical rays also go from one point and outwards. Both go in one direction continuously

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2 years ago

Read 2 more answers

Simplify this expression (1/3 + 11/12)×2/3

alisha [4.7K]

1/3 = 4/12

(4/12 + 11/12) * 2/3

= 15/12 * 2/3

15/ 12 can also be written as 5/4

5/4 * 2/3 = 10/12

10/12 can be simplified into 5/6

Therefore, the answer is 5/6

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3 years ago

A study published in Health Magazine in 2010 suggested that a combination of high blood pressure and binge drinking have an incr

nekit [7.7K]

Answer:

This is a Retrospective study

Step-by-step explanation:

Retrospective study is a study that compares two groups of people; those with disease or condition under study and a very similar group of people who do not have the disease or condition.

Here they are compring those men with high blood pressure who drank and those with no high blood pressure and don't drink.

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2 years ago

Who invent natural numbers???

makkiz [27]

Answer:

nobody

Step-by-step explanation:

Humans have made use of natural numbers as long as humans have been around. Counting numbers are wired into our consciousness, as they are for many living things.

Research has demonstrated some plants can count up to 5 (generally, carnivorous ones). Honeybees have long been known to be able to count to 4, and recent research shows they can count higher. Fish can count; birds can count; as can many other species.

For most, it takes concentration and/or training to count beyond 4. We are born with an understanding of 1, 2, 3, more.

Nobody "invented" natural numbers.

_____

Additional comment

Prey species survive by being able to count predators. Some predators take advantage of the limitations of number recognition by hunting in groups larger than can be readily counted.

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2 years ago

What is true of the coefficient of variation?

DedPeter [7]

Answer:

A. The coefficient of variation is best used when comparing two data sets that use the same units of measure.

Step-by-step explanation:

The coefficient of variation (CV), is simply the standard deviation (itself a measure of variance or variation) relative to the mean of a distribution.

The coefficient of variation expresses a random variable’s variability in percentage terms. Therefore it is possible, through the coefficient of variation, to compare the variability of data across different samples, especially if the random variables are recorded in different units of measurement (such as cm, kg and minutes).

A coefficient of variation is always interpreted as a percentage. Mathematical representation is:

$Coefficient\ of\ variation\ = \frac{Standard\ deviation}{Mean}\ \%$

The coefficient of variation is best used when comparing two data sets that use the same units of measure.

Hence, the option (A) is the correct option.

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3 years ago