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Radda [10]
3 years ago
15

Find the area of a circle with a circumference of 6.28 units ​

Mathematics
1 answer:
ad-work [718]3 years ago
8 0

Answer 3.14

Step-by-step explanation:

Area= pi*r^2

Circumference=2*pi*r

Area=C^2/4pi= 6.28^2/4*pi which ='s 3.13841

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As the number of baseball cards increases, what happens to the money spent in dollars?
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Answer:

decreases

Step-by-step explanation:

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Write the following fraction as a decimal.<br> 2<img src="https://tex.z-dn.net/?f=%5Cfrac%7B7%7D%7B10%7D" id="TexFormula1" title
vfiekz [6]

Answer:

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2/10=.50

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5 0
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How much water must be evaporated from 130 gallons of a 9% acid solution to make a 12% acid solution?
Bad White [126]

Answer: 33 gallons

Step-by-step explanation:

We initially have 130 gallons of a 9\% acid solution and we need to change it to a 12\% acid solution, and for that it is necessary to evaporate n gallons of water.

So, this situation can be mathemtically expressed as follows:

(130)(9\%)=(130-n)(12\%)

Then:

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Isolating n:

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6 0
3 years ago
Please help Slove for x
gayaneshka [121]

Answer:

x = 20

Step-by-step explanation:

These angles are consecutive interior angles, so when added they will equal 180 degrees (according to the consecutive interior angles theorem).

3x - 10 + 5x + 30 = 180          add/subtract all like terms

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8x = 160

x = 20  <--- This will be your answer

Hope it helps!

7 0
3 years ago
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- if you have a piecewise function defined as y=x when x < 0 
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Then start at point 1 (this time with a closed circle because y=-x is defined at 1, and graph y=-x.</span>
4 0
3 years ago
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