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2 years ago

If f(x) = x² - 2x, find: ƒ(6) = [ ? ]

Mathematics

1 answer:

zhannawk [14.2K]2 years ago

7 0

Answer:

Step-by-step explanation:

To find ƒ(6), we have to substitute x = 6 into the expression for ƒ(x):

ƒ(6) = (6)² - 2(6)

= 36 - 12

= 24

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The article "Occurrence and Distribution of Ammonium in Iowa Groundwater" (K. Schilling, Water Environment Research, 2002:177–18

Papessa [141]

Answer: 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

Step-by-step explanation:

Since we have given that

Number of alluvial wells = 349

Number of quaternary wells = 143

Number of alluvial wells that had concentrations above 0.1 = 182

Number of quaternary wells that had concentrations above 0.1 = 112

Average of alluvial wells = 0.27

Standard deviation = 0.4

Average of quaternary wells = 1.62

Standard deviation =1.70

So, 95% confidence interval gives

alpha = 5% level of significance.

$\dfrac{\alpha}{2}=2.5\%\\\\z_{\frac{\alpha}{2}}=1.96$

So, 95% confidence interval becomes,

$(1.62-0.27)\pm 1.96\sqrt{\dfrac{0.4^2}{349}+\dfrac{1.7^2}{143}}\\\\=1.35\pm 1.96\times 0.020\\\\=(1.35-0.040,1.35+0.040)\\\\=(1.31,1.39)$

Hence, 95% confidence interval for the difference between the proportions would be (1.31, 1.39).

6 0

3 years ago

If your claim is in the null hypothesis and you reject the null hypothesis, then your conclusion would be:

dusya [7]

Answer:

Step-by-step explanation:

If my claim is in the null hypothesis and I reject the null hypothesis, it means the claim is not supported.

The claim would have been supported if I failed to reject the null hypothesis.

The conclusion would therefore be that there is not sufficient sample evidence to support the original claim.

5 0

3 years ago

If the interior angle of a polygon is 170 how many sides does it have

Tpy6a [65]

if interior angle is 170, subtract 170 from 180 to find exterior angle:

180-170 = 10 = exterior angle

the sum of exterior angles is 360 so divide by exterior angle to find sides:

360 /10 = 36 sides

6 0

3 years ago

I will mark brainillst 9 to the 4th power times 10 to the 4th power

Mariulka [41]

Answer:

65,610,000

Explanation:

9*9*9*9 + 10*10*10*10

8 0

3 years ago

Read 2 more answers

Use the rule of 70 to estimate the time it will take an initial quantity to drop to half its value when h(x)=20*0.97^x, where x

Gre4nikov [31]

The rule of 70 is used to estimate the time it will take an initial quantity to drop to half its value:
70 : (the decreasing rate) = x ( months )
The decreasing rate = 1 - 0.97 = 0.03 = 3%
x = 70 : 3 = 23.33 = 23 1/3 = 23 months and 10 days.
Verify:
20 * 0.97^(23.33) = 9.83 ≈ 10

5 0

3 years ago