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USPshnik [31]
3 years ago
12

Pls, help me. I know this is a lot to ask but... I rlly need help. I will mark you brainliest, and give a little extra points ou

t... I will also give you a thanks, and a 5 star review, thank you... Oh I almost missed something... Merry Almost Christmas, lol:)

Mathematics
2 answers:
tresset_1 [31]3 years ago
5 0
I don’t know the answer yet, I’ll reply to my comment with it, but merry Christmas to you too!!
djyliett [7]3 years ago
5 0

Answer:

A. 25/100

B. 1.75 billion people in the world would have no food or shelter. In scientific notation this translates to 1.75 × 10^9

C. 17 percent of the worlds population speaks Chinese, or 1.19 billion people. In scientific notation that translates to 1.19 × 10^9.

D. In a world of 100 people, around 4/100 or 4 percent would live in the U.S.

In 3 × 10^8, that translates to 300 Million out of 7 billion. Exactly 4.28 percent of the worlds population would live in the U.S. Now, translating that percent to a much smaller scale, out of 100 people only 4 people would live in the U.S. You can't have 0.28 percent of a person, so we just estimate it to 4 people.

Step-by-step explanation:

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The ratio of a to b is 3 to 1, and the ratio of b to c is 1 to 5. What is the value of 2a+3b/ 4b+3c?
Nostrana [21]

Answer:

B

Step-by-step explanation:

Expressing the ratios as fractions, that is

\frac{a}{b} = \frac{3}{1} ( cross- multiply )

a = 3b

\frac{b}{c} = \frac{1}{5} ( cross- multiply )

c = 5b

------------------------------------------

Given

\frac{2a+3b}{4b+3c} , substitute values from above for a and c

= \frac{2(3b)+3b}{4b+3(5b)}

= \frac{6b+3b}{4b+15b}

= \frac{9b}{19b} ← cancel b on numerator/ denominator

= \frac{9}{19} → B

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3 years ago
Please help and thank you
Scorpion4ik [409]

Answer:

a

Step-by-step explanation:

6 0
3 years ago
Helps ASAP please and I will give brainliest plssssss and pls answer correctly
masya89 [10]

Answer:

b

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Describe how the variability of the distribution changes as the sample size increases. As the sample size increases, the variabi
wolverine [178]

Answer:

As the sample size increases, the variability decreases.

Step-by-step explanation:

Variability is the measure of actual entries from mean.  The less the deviations the less would be the variance.

For a sample  of size n, we have by central limit theorem the mean of sample follows a normal distribution for random samples of large size.

X bar will have std deviation as \frac{s}{\sqrt{n} }

where s is the square root of variance of sample

Thus we find the variability denoted by std deviation is inversely proportion of square root of sample size.

Hence as sample size increases, std error decreases.

As the sample size increases, the variability decreases.

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3 years ago
I need help ASAP because I need done before 4:00pm
Naddik [55]

Answer:

the 13th one is 115

Step-by-step explanation:

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