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kherson [118]
3 years ago
8

Write an equation, and express the product in standard form.

Mathematics
1 answer:
rosijanka [135]3 years ago
7 0

Answer: 3 copies of 5 tenths = 3*0.5 = 1.5

Step-by-step explanation:

Ok, if we have:

"3 copies of a number B"

This is written as:

3*B

And we have that the number B is "5 tenths"

Now, a tenth is the first digit after the decimal point.

Then 5 tenths = 5*0.1 = 0.5

B = 0.5

3 copies of 5 tenths = 3*0.5 = 1.5

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The perimeter of a quarter circle is 17.85 miles. What is the quarter circle’s radius?
siniylev [52]

Answer:

8.1

Step-by-step explanation:

The perimeter of a circle means the circumference. In this question it says the perimeter of a quarter circle is 17.85 miles and we want to find the quarter circle’s radius.

We know that the perimeter of the quarter circle is 17.85 which means that the 2 radii and the circumference of the circle sum to 17.85.

The formula to work out the perimeter of a quarter circle is     2r+\frac{\pi }{2}   . We can  form an equation to work out the radius so,

2r+\frac{\pi }{2}  =    17.85

→ Multiply everything by 2 to get rid of the fraction

4r + π = 35.7

→ Minus π from both sides to isolate 4r

4r = 32.55840735

→ Divide both sides by 4 to isolate 4

r = 8.139601837

The radius of the quarter circle is 8.1 miles to 1 decimal place

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3 years ago
The fall of the Zhou dynasty began a period referred to as __________.
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The fall of the Zhou dynasty began a period referred to as the Warring States period. The Warring states period consisted of essentially seven states engaging in war with each other. The Zhou Dynasty lasted longer than any other Chinese dynasty, but the power of the dynasty lasted for a shorter period of time than their reign. 
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Whats the percent change from 100 to 140​
Dahasolnce [82]

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40%

Step-by-step explanation:

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Simply the expression.<br><br> 10(6y + 12) + 8(7y - 4)
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Answer: 116y+88

Step-by-step explanation:

<u>Distribute:</u>

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<u>Combine like terms:</u>

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Find Volume<br> A sphere has a radius of 1.5 feet.
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Answer:

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Step-by-step explanation:

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=4/3(π)3.375

=14.14ft^3

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