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Veseljchak [2.6K]
4 years ago
8

Find the area of a circle with a radius of .5 m

Mathematics
2 answers:
Monica [59]4 years ago
4 0

Answer:

A = 0.785 m^2

Step-by-step explanation:

A = pi r^2

A = 3.14 x (0.5)^2

A = 3.14 x 0.25

A = 0.785 m^2

beks73 [17]4 years ago
3 0

Answer:

78.54mx^{2} (2 d.p)

Step-by-step explanation: Area of a circle= \pi rx^{2}

=3.14*(5*)

=3.14*25

=78.54 mx^{2}

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The thickness (in millimeters) of the coating applied to hard drives is one characteristic that determines the usefulness of the
Ede4ka [16]

Answer:

The sampling distribution of X, for a sample of size 16, will be approximately normal with mean 2 mm and standard deviation 0.01 mm.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For the population:

Mean 2 mm, standard deviation 0.04 mm

Describe the sampling distribution of X (for a sample of size 16).

Sample of size 16 means that n = 16

By the Central Limit Theorem, approximately normal with mean 2 and standard deviation s = \frac{0.04}{\sqrt{16}} = 0.01

8 0
3 years ago
5.12 rounded to the nearest whole million
guajiro [1.7K]

<em>Greetings!</em>

In order to round to the nearest million, we will have to move the decimal 5 places to the left.

0.0000512 will be your answer.

<em>Hope this helps!</em>

~Fluerie

8 0
3 years ago
Mitch is replacing all the light bulbs in his home with energy efficient LED light bulbs. How many packages of 4 will he need to
Oxana [17]
The answer is C)22.
If each package has 4, you divide 86 by 4 and get 21.5. You round up since you’ll need 2 out of the 4 bulbs in the last package.
3 0
3 years ago
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Convert the following to scientific notation<br> A) 0.315<br> B) 5,820,000,000
Savatey [412]

Answer:

Step-by-step explanation:

a. 0.315 = 3.15 x 10^-1

b. 5,820,000,000 = 5.82 x 10^9

3 0
3 years ago
What is -4+5x-17-22x simplified by combining like terms?
Lapatulllka [165]

Answer:

-17x - 21

Step-by-step explanation:

-4 + 5x - 17 - 22x

(-4 - 17) + (5x - 22x)

(-21) + (-17x)

-17x - 21

6 0
3 years ago
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