3 years ago

I need help pls.....................................

Mathematics

1 answer:

Feliz [49]3 years ago

8 0

Answer: I think that answers.com has the question and answer

Step-by-step explanation:

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If w = t and t = 9, what is the value of w?<br> –9<br> –1<br> 1<br> 9

9966 [12]

Answer:

Step-by-step explanation:

if t =9 and also t=w then w=9

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3 years ago

The diameter of a cookie is 2 inches. If π = 3.14, what is the area of the cookie, rounded to the nearest tenth?

insens350 [35]

Answer:

3.1 inches

Step-by-step explanation:

Area of the cookie =Pi r^2

Pi = 3.14

Diameter = 2inches

Radius r = diameter/2 = 2/2

= 1

Therefore

Area = 3.14 x 1^2

= 3.14 x 1 x 1

= 3.1 inches

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3 years ago

If 28% of students in College are near-sighted, the probability that in a randomly chosen group of 20 College students, exactly

cluponka [151]

Answer: (D) 16%

Step-by-step explanation:

Binomial probability formula :-

$P(x)=^nC_xp^x(1-p)^n-x$ , where n is the sample size , p is population proportion and P(x) is the probability of getting success in x trial.

Given : The proportion of students in College are near-sighted : p= 0.28

Sample size : n= 20

Then, the the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is given by :_

$P(x=4)=^{20}C_4(0.28)^4(1-0.28)^{20-4}\\\\=\dfrac{20!}{4!16!}(0.28)^4(0.72)^{16}\\\\=0.155326604912\approx0.16\%$

Hence, the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is closest to 16%.

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3 years ago

How is 340 divided by 17 reasonable

vivado [14]

17 goes into 34 two times

and goes into 0 zero times

So 340 / 17 = 20

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Pvc pipe is manufactured with a mean diameter of 1.01 inch and a standard deviation of 0.003 inch. find the probability that a r

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The probability that the sample mean is within 2 standard deviations on the high side and 1 standard deviation on the low side is about 0.8186.

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3 years ago

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