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3 years ago

PLZ HURRY IT'S URGENT!!!!!!!

Mathematics

2 answers:

klasskru [66]3 years ago

7 0

I think it would be C but that’s just my opinion

Zina [86]3 years ago

3 0

Answer:

D. 16

Step-by-step explanation:

8/x=5/10.

if you cross multiply, it gives you 5x=8*10 which equals to 5x=80.

Then, you divide 80 by 5 to leave the x by itself. 80 divided by 5 is 16.

Another way is 5/10 equals 1/2 so you find the double of 8 which is 16. 8/16=1/2 -> 1/2=1/2 so that means that 8/16 can equal 5/10

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Please help and explain the process

Snowcat [4.5K]

The answer is either $61.62 or $12.72

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3 years ago

One hundred rats with mothers that were exposed to high levels of tobacco smoke during pregnancy were put through a simple maze.

Paul [167]

Answer:

The 90% confidence interval for pis (0.7342, 0.8658).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

100 rats mothers, 80 went right. So $n = 100, \pi = \frac{80}{100} = 0.8$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 - 1.645\sqrt{\frac{0.8*0.2}{100}} = 0.7342$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 + 1.645\sqrt{\frac{0.8*0.2}{100}} = 0.8658$

The 90% confidence interval for pis (0.7342, 0.8658).

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2 years ago

A can of tuna is in the shape of a cylinder. The distance around the top of the cylinder is approximately 251.2 mm. The tuna com

bulgar [2K]

Answer: 39.9797217047

Step-by-step explanation:

2πr = 251.2

πr = 125.6

r = 39.9797217047

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2 years ago

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What are exponents??????

xxTIMURxx [149]

Answer:

a quantity representing the power to which a given number or expression is to be raised, usually expressed as a raised symbol beside the number or expression (e.g. 3 in 23 = 2 × 2 × 2).

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2 years ago

Look at the picture.....

tresset_1 [31]

Answer:

Step-by-step explanation:

y = a|x-h| + k

(h,k) is the vertex

There's no standard formula for absolute values. I just made it up as an example, pretty much.

Since a is negative, the function opens downward.

h = -2, k = 0, so the vertex is at (-2,0)

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2 years ago

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