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3 years ago

What does the problem equal

Mathematics

1 answer:

vesna_86 [32]3 years ago

6 0

Answer: 10•76=760 :)

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According to a Field Poll conducted February 8 – 17, 2005, 79% of California adults (actual results are 400 out of 506 surveyed)

Jobisdone [24]

Answer: (0.760, 0.820)

Step-by-step explanation:

Let p be the population proportion of all adults feel that "education and our schools" is one of the top issues facing California.

Given : 79% (actual results are 400 out of 506 surveyed) of California adults feel that "education and our schools" is one of the top issues facing California.

i.e.Sample size : n= 506

Sample proportion : $\hat{p}=0.79$

Critical value for 90% confidence interval ( Using z-value table) :

$z=1.645$

Now, the 90% confidence interval for the population proportion will be :

$\hat{p}\pm z\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

i.e. $0.79\pm (1.645)\sqrt{\dfrac{0.79(1-0.79)}{506}}$

i.e. $0.79\pm (1.645)(0.0181)$

$\approx0.79\pm 0.030=(0.79-0.030,\ 0.79+0.030)\\\\=(0.760,\ 0.820)$

Hence, the 90% confidence interval for the population proportion= (0.760, 0.820)

7 0

4 years ago

Solve y = x2 +7 for x.

FromTheMoon [43]

$\huge\boxed{x=\sqrt{y-7}}$

We are trying to isolate $x$ . Subtract $7$ from both sides. $y-7=x^2$

Find the square root of both sides. $\boxed{\sqrt{y-7}}=x$

<em>Note: I've attached a graph of $y=x^2 +7$ .</em>

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4 years ago

In a topographical map of a city, the vertices of the city limits are A (10, 9), B (18, 9), C (18, 2), D (14, 4.5), and E (10, 4

harkovskaia [24]

Srry don't have answer NEEEEEDDD HELP!!

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3 years ago

What’s the value of point a on the x axis

pav-90 [236]

The value of point a on the x axis is anywhere that’s from left to right from the origin (0,0) There should normally be indications on where the graph is.

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3 years ago

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Alla [95]

The checked answers you have are correct.

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3 years ago