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noname [10]
3 years ago
10

Write 40% as a fraction

Mathematics
2 answers:
AleksandrR [38]3 years ago
7 0

Answer: The answer is 2/5

Vilka [71]3 years ago
7 0

Answer: 2/5

Step-by-step explanation:  To convert a Percent to a Fraction follow these steps:

Step 1: Write down the percent divided by 100 like this: percent 100.

Step 2: If the percent is not a whole number, then multiply both top and bottom by 10 for every number after the decimal point. ...

Step 3: Simplify (or reduce) the fraction.

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3 years ago
Solve 169x^2-42.25=0 by using square roots?<br><br> NEED HELP!!!
jekas [21]

Answer:

x = 1/2 , x = -1/2

Step-by-step explanation:

Given equation;

169x² - 42.25

Find:

Solution of equation using square root

Computation:

169x² - 42.25

We know that 13² = 169 and 6.5² = 42.25

So,

[13x]² - [6.5]²

a² - b² = (a + b)(a - b)

So,

[13x]² - [6.5]² = [13x + 6.5][13x - 6.5]

So,

13x + 6.5 = 0 , 13x - 6.5 = 0

x = 6.5 / 13 , x = -6.5 / 13

x = 1/2 , x = -1/2

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2 years ago
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3 years ago
Assume that the weights of spawning Chinook salmon in the Columbia river are normally distributed. You randomly catch and weigh
s344n2d4d5 [400]

Answer: The point estimate for the mean weight of all spawning Chinook salmon in the Columbia River is the mean weight from your sample (\overline{x}) = 31.2 pounds .

Step-by-step explanation:

The weights of spawning Chinook salmon in the Columbia river are normally distributed.

Given :  The mean weight from your sample is 31.2 pounds with a standard deviation of 4.4 pounds.

The point estimate for the mean (\mu) weight of all spawning Chinook salmon in the Columbia River is the mean weight from your sample (\overline{x}) i.e. is 31.2 pounds because the best point estimate for population mean is the sample mean. [in normal distribution]

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