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3 years ago

Give the formula in finding the surface area of the cube

Mathematics

2 answers:

Korolek [52]3 years ago

8 0

Answer:

A=6a²

Step-by-step explanation:

Lowercase a is the length of one side.

sineoko [7]3 years ago

4 0

A=6a^2 is the formula

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Peter's weekly salary is 110% of his brother's weekly salary. If his brothers weekly salary is x dollars, which expression gives

frez [133]

Answer:1.10x

Step-by-step explanation:

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3 years ago

PLS HELP ASAP... WILL MARK BRAINLIEST!!!!

Flura [38]

4 or more i might be wrong though

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3 years ago

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The U.S. Energy Information Administration (US EIA) reported that the average price for a gallon of regular gasoline is $2.94. T

Anit [1.1K]

Answer:

a) 25

b) 67

c) 97

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample. In this problem, $\sigma = 0.25$

(a) The desired margin of error is $0.10.

This is n when M = 0.1. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.1 = 1.96*\frac{0.25}{\sqrt{n}}$

$0.1\sqrt{n} = 1.96*0.25$

$\sqrt{n} = \frac{19.6*0.25}{0.1}$

$(\sqrt{n})^{2} = (\frac{19.6*0.25}{0.1})^{2}$

$n = 24.01$

Rounding up to the nearest whole number, 25.

(b) The desired margin of error is $0.06.

This is n when M = 0.06. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.06 = 1.96*\frac{0.25}{\sqrt{n}}$

$0.06\sqrt{n} = 1.96*0.25$

$\sqrt{n} = \frac{19.6*0.25}{0.06}$

$(\sqrt{n})^{2} = (\frac{19.6*0.25}{0.06})^{2}$

$n = 66.7$

Rounding up, 67

(c) The desired margin of error is $0.05.

This is n when M = 0.05. So

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.05 = 1.96*\frac{0.25}{\sqrt{n}}$

$0.05\sqrt{n} = 1.96*0.25$

$\sqrt{n} = \frac{19.6*0.25}{0.05}$

$(\sqrt{n})^{2} = (\frac{19.6*0.25}{0.05})^{2}$

$n = 96.04$

Rounding up, 97

8 0

3 years ago

Which ones are equivalent?

Contact [7]

Answer:

C AND D

Step-by-step explanation:

haha look that spells candy!! please mark brainliest! thank you!!

4 0

3 years ago

A worker bee has a mass of 0.00011 \text{ kg}0.00011 kg0, point, 00011, start text, space, k, g, end text.

xenn [34]

Answer:

Answer:

1). Option (A)

2). Option (A)

Step-by-step explanation:

1). A worker bee has the mass = 0.00011 kg

In scientific notation we can convert the mass of bee as,

0.00011 =

Since 1.1 ≈ 1,

Therefore, 1.1 × 10⁻⁴ ≈ 1 × 10⁻⁴ kg

Option (A) is the answer.

2). An African elephant has a mass = 8139 kg

In scientific notation,

8139 = 8.139 × 10³

Since, 8.139 ≈ 8

Therefore, 8139 kg = 8.139 × 10³ kg

Option (A) is the answer.

Step-by-step explanation:

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3 years ago

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