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3 years ago

What is 4 5/8 + 3 2/3? PLS HELP

Mathematics

2 answers:

MA_775_DIABLO [31]3 years ago

6 0

Answer:

8 7/23

Step-by-step explanation:

You need to find a common denominator

Start out by converting them to improper fractions.

4 5/8= 37/8

3 2/3= 11/3

Find the common denominator

Multiply the denominator by the necessary number to reach 24.

Multiply the numerator by that number.

37*3/8*3= 111/24

11*8/3*8= 88/24

Add them

199/24

Convert back to a mixed number

8 7/24

zhuklara [117]3 years ago

4 0

Answer:

4 5/8 + 3 2/3 = 8 7/24

Step-by-step explanation:

hope it helps.

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A sample size of at least 737 specimens is required.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the width M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem, we have that:

$M = 3, \sigma = 31.62$

So:

$M = z*\frac{\sigma}{\sqrt{n}}$

$3 = 2.575*\frac{31.62}{\sqrt{n}}$

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3 years ago