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3 years ago

What are the answers to these ratio problems?

Mathematics

1 answer:

Stella [2.4K]3 years ago

8 0

A.) when there are 24 boys, there are 36 girls.

b.) If there are 80 students, there are.... 48 girls.

c.) If there are 75 students...... there are 15 more girls than boys.

Let me know if you need me to show you how I got this.

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noname [10]

Answer:

I think b no is the answer. I am very sorry if it is wrong answer.

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3 years ago

A bag contains 10 colored marbles - 4 red, 4 blue and 2 green.

alexira [117]

the probability would be 100% if your smart

Step-by-step explanation:

ok so think of this if you have 10 marbles but it never said anything about getting rid of marbles ,you can get rid of four marbles.

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3 years ago

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1)Which choices shows the statement below in if-then form? Exercise makes you healthier.

jek_recluse [69]

Answer:

D for both

Step-by-step explanation:

Exercise is the condition and healthier is the outcome. So if you exercise then you will be healthier.

All cardinals are red. But not all red birds are cardinals. So d is the only one that is always true

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3 years ago

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Curtis bought a skateboard which he later sold at a 30% loss for £14. How much did Curtis pay for

Norma-Jean [14]

Answer:

18 pounds if I'm correct

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3 years ago

An air transport association surveys business travelers to develop quality ratings for transatlantic gateway airports. The maxim

Flura [38]

Answer:

The 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

Step-by-step explanation:

The (1 - α)% confidence interval for the population mean, when the population standard deviation is not provided is:

$CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}$

The sample selected is of size, n = 50.

The critical value of t for 95% confidence level and (n - 1) = 49 degrees of freedom is:

$t_{\alpha/2, (n-1)}=t_{0.05/2, 49}\approx t_{0.025, 60}=2.000$

*Use a t-table.

Compute the sample mean and sample standard deviation as follows:

$\bar x=\frac{1}{n}\sum X=\frac{1}{50}\times [1+5+6+...+10]=6.76\\\\s=\sqrt{\frac{1}{n-1}\sum (x-\bar x)^{2}}=\sqrt{\frac{1}{49}\times 31.12}=2.552$

Compute the 95% confidence interval estimate of the population mean rating for Miami as follows:

$CI=\bar x \pm t_{\alpha/2, (n-1)}\cdot \frac{s}{\sqrt{n}}$

$=6.76\pm 2.000\times \frac{2.552}{\sqrt{50}}\\\\=6.76\pm 0.722\\\\=(6.038, 7.482)\\\\\approx (6.0, 7.5)$

Thus, the 95% confidence interval estimate of the population mean rating for Miami is (6.0, 7.5).

7 0

3 years ago