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cluponka [151]
3 years ago
14

What is the equation of a circle whose center is at (-2, 1) and radius is 2.2?

Mathematics
1 answer:
Lena [83]3 years ago
3 0
C is the correct answer
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Circle O has a circumference of approximately 250ft. What is he approximate length of the diameter, d?
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Circumference = pi *d

250 = pi * d

divide each side by pi

250/pi = d

pi is approximately 3.14

250/3.14 = d

79.62 = d

the diameter is approximately 79.62 ft

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Answer:

Step-by-step explanation

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If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 g/mol, how many sodium atoms a
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8.2 grams = 1 mol
Na ________
22.99 grams

First multiply the value of 8.2 to 1. Then divide by the value of 22.99 to determine the number of moles of sodium present in the 8.2 gram sample.

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