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Mathematics

1 answer:

sergey [27]2 years ago

6 0

Answer:(3 * h^12 *k^2)/2

Step-by-step explanation:First distribute the exponent 6 to the terms inside, so you get 3h^12 *k^6/2k^4 ,then divide k^6 by k^4 to get k^2 on top.

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R^2 -9tw +3wr -3tr =

Tju [1.3M]

The answer would be....(r + 3w) × ( r - 3t)

6 0

3 years ago

Devaughn's age is two times sydney's age. the sum of their ages is 30 . what is sydney's age

Anton [14]

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6 0

2 years ago

Solve x^3 = 1/8 Is it 1/2, +1/2, 1/4 or + 1/4 ( area and square roots)

k0ka [10]

Answer:

Step-by-step explanation:

x^3 = 1/8

Taking the cube of both side

x^3 = 1/(2)^3

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8 0

2 years ago

One person wants to get a 95% z-confidence interval with a margin of error of at most 15 based on a population standard deviatio

Bess [88]

Answer:

$n=(\frac{1.96(60)}{15})^2 =61.46 \approx 62$

So the answer for this case would be n=62 rounded up to the nearest integer

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X$ represent the sample mean for the sample