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2 years ago

What is 3/4 doubled? Is it 6/8 or 1 2/4?

Mathematics

1 answer:

Amanda [17]2 years ago

6 0

Answer:

1 2/4

Step-by-step explanation:

3/4 doubled is $2(\frac{3}{4} )=\frac{3}{2}$

Now, $\frac{6}{8} =\frac{3}{4}$ on simplification.

$1 \frac{2}{4} =\frac{6}{4} =\frac{3}{2}$

Therefore,

3/4 doubled is 1 2/4

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Evaluate 10b + 3c, if b=3 and c = 11.

kozerog [31]

Answer:

Step-by-step explanation:

10 × 3 = 30

3× 11 = 33

30 + 33 = 63

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2 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

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Gail baked some cookies. She sold 2/7 of the cookies on Monday. She sold 1/3 more of the cookies on Tuesday than on Monday. What

Zina [86]

So 2/7 cookies on Monday
n 1/3 more on Tuesday
so we are going to fine Tuesday's amount , to find what fraction did Gail sell on the two days
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2/7 + 1/3
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3 years ago

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard devia

gtnhenbr [62]

Answer:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

Step-by-step explanation:

Let's define some notation

$\bar X$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=58.2$ represent the population standard deviation

n represent the sample size

$ME =1$ represent the margin of error desire

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =+1 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 99% of confidence interval now can be founded using the normal distribution. The significance would be $\alpha=0.01$ and the critical value $z_{\alpha/2}=2.58$ , replacing into formula (b) we got:

$n=(\frac{2.58(58.2)}{1})^2 =22546.82 \approx 22547$

So the answer for this case would be n=22547 rounded up to the nearest integer

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2 years ago

Can someone figure out b please

labwork [276]

Scaled by 2, side lengths are 3, 4 and 5

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3 years ago