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3 years ago

A piece of aluminium has a volume of 6.0cm^3 and a density of 2.70 g\cm^3 what is its mass????

1 answer:

7 0

Density = Mass / volume is the original equation.

If we change it to solve for mass:

Mass = (Density)(volume)

Plug in the numbers:

M = (2.70 g/cm^3)(6.0cm^3) = 16.2 g

Hope that helps! :)

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Question 9 20% of a particular brand of light bulbs fail in one year. What is the probability that three bulbs out of a random c

Delvig [45]

Answer:

The correct answer is 0.15

Step-by-step explanation:

According to the given scenario, the probability is as follows:

X $\sim$ Bin (n,p)

Here

n = 8

p = 0.20 or 20%

Now this is a binomial probability distribution

$P(X) = ^nC_x \times p^x \tmes (1 - p)^{n-x}\\\\P(3) = ^8C_3 \tims 0.20^3 \times (1 - 0.20)^5$

= 0.15

Hence, the correct answer is 0.15

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2 years ago

the profit of a company is modeled by p = 4t + 15,500, where p is the profit and t is the time in months. what is the dependent

posledela

The dependent variable is the profit because that is what you're measuring

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3 years ago

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In the figure, BC is a support for the roof<br> of a garage. What is the length of BC?

Sonbull [250]

Answer:

Bc = √63 ft

Step-by-step explanation:

Here, we want to get the length of BC

As we can see, there is a right angled triangle ABC, with 12ft being the hypotenuse and 9 ft the other side

So we want to get the third leg which is BC

we can use the Pythagoras’ theorem here

And that states that the square of the hypotenuse equals the sum of the squares of the two other sides

let the missing length be x

12^2 = x^2 + 9^2

144 = x^2 + 81

x^2 = 144-81

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x = √63 ft

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2 years ago

Standard deviation of a normal data distribution is a _______. Group of answer choices

FrozenT [24]

Answer:

Standard deviation of a normal data distribution is a measure of data dispersion.

Step-by-step explanation:

Standard deviation is used to measure dispersion which is present around the mean data.

The value of standard deviation will never be negative.

The greater the spread, the greater the standard deviation.

Steps-

1. At first, the mean value should be discovered.

2.Then find out the square of it's distance to mean value.

3.Then total the values

4.Then divide the number of data point.

5.the square root have to be taken.

Formula-

SD= $\sqrt{\frac{(\sum{x-x)^2} }{n-1}$

Advantage-

It is used to measure dispersion when mean is used as measure of central tendency.

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3 years ago

I need help with this problem

juin [17]

A. would be the answer because if you distribute/factor the expression you would get A.

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3 years ago

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