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3 years ago

What is change in elevation from 8,500 m to 3,400?

Mathematics

2 answers:

Anarel [89]3 years ago

6 0

Answer:

5,100M

Step-by-step explanation:

castortr0y [4]3 years ago

4 0

Answer:

5,100m

Step-by-step explanation:

To find the change of elevation subtract 3,400 from 8,500.

8,500 - 3,400 = 5,100

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In a large population, 76% of the households have cable tv. A simple random sample of 225 households is to be contacted and the

serious [3.7K]

Answer:

0.017559

Step-by-step explanation:

Data provided:

Probability of Households Having cable TV, p₀ = 76% = 0.76

Therefore,

The probability that the Households not having cable TV = 1 - 0.76 = 0.24

Sample size, n = 225 households

sample proportions is less than 82% i.e p = 0.82

Now,

The standard error, SE = $\sqrt{\frac{p_0(1-p_0)}{n}}$

SE = $\sqrt{\frac{0.76(1-0.76)}{225}}$

SE = 0.02847

and,

$Z=\frac{p-p_0}{SE}$

$Z=\frac{0.82-0.76}{0.02847}$

Z = 2.107

therefore,

P(sample porportions < 0.82) = P(Z < 2.107)

now from the p value from the Z table

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P(sample porportions < 0.82) = 0.017559

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3 years ago

How do you do 124.2 divided by 23

n200080 [17]

It's 5.4- I just used the calculator on my phone but I would've just done long division if I didn't have a calculator

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3 years ago

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Point Ais a representation of which number on the number line?<br> 0<br> T<br> -3<br> 1

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Answer:

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Step-by-step explanation:

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3 years ago

Use the fundamental identities and appropriate algebraic operations to simplify the following expression. (18 +tan x) (18-tan x)

andrezito [222]

Answer:

a) $\left(18+\tan \left(x\right)\right)\left(18-\tan \left(x\right)\right)+\sec ^2\left(x\right)=325$

b) The lowest point of $y=\cos \left(x\right)$ , $0\leq x\leq 2\pi$ is when x = $\pi$

Step-by-step explanation:

a) To simplify the expression $\left(18+\tan \left(x\right)\right)\left(18-\tan \left(x\right)\right)+\sec ^2\left(x\right)$ you must:

Apply Difference of Two Squares Formula: $\left(a+b\right)\left(a-b\right)=a^2-b^2$

$a=18,\:b=\tan \left(x\right)$

$\left(18+\tan \left(x\right)\right)\left(18-\tan \left(x\right)\right)=18^2-\tan ^2\left(x\right)=324-\tan ^2\left(x\right)$

$324-\tan ^2\left(x\right)+\sec ^2\left(x\right)$

Apply the Pythagorean Identity $1+\tan ^2\left(x\right)=\sec ^2\left(x\right)$

From the Pythagorean Identity, we know that $1=-\tan ^2\left(x\right)+\sec ^2\left(x\right)$

Therefore,

$324[-\tan ^2\left(x\right)+\sec ^2\left(x\right))]\\324[+1]\\325$

b) According with the below graph, the lowest point of $y=\cos \left(x\right)$ , $0\leq x\leq 2\pi$ is when x = $\pi$

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3 years ago

Simplify 4.2^-3 x 5.1^2 x 4.2^4 x 5.1^3

Stolb23 [73]

Answer:

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Step-by-step explanation:

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3 years ago