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Sphinxa [80]
3 years ago
12

What is the equation of a circle centered at the origin with radius 20?

Mathematics
1 answer:
Colt1911 [192]3 years ago
3 0
We know that
the equation of a circle is
(x-h)²+(y-k)²=r²
where 
(h,k)-----> is the center
r--------> is the radius

is the center is the point (0,0) and radius  r=20
then
(h,k) is (0,0)

(x-0)²+(y-0)²=20²---------> (x)²+(y)²=400


the answer is
the option D.)  x2 + y2 = 400
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Isotope mass (amu) abundance (%) 1 203.97304 1.390 2 205.97447 24.11 3 206.97590 22.09 4 207.97665 52.41 find the atomic mass of
Nata [24]
Answer:
average atomic mass = 207.2172085 amu

Explanation:
To get the average atomic mass of an element using the abundance of its isotopes, all you have to do is multiply each isotope by its percentage of abundance and then sum up all the products.

For the question, we have:
203.97304 amu has an abundance of <span>1.390% (0.0139)
</span>205.97447 amu has an abundance of 24.11% (0.2411)
206.97590 amu has an abundance of 22.09% (0.2209)
207.97665 amu has an abundance of 52.41 % (0.5241)

The average atomic mass can be calculated as follows:
average atomic mass = 203.97304(0.0139) + 205.97447(0.2411)
                                     + 206.97590(0.2209) + 207.97665(0.5241)
average atomic mass = 207.2172085 amu

Hope this helps :)
7 0
4 years ago
Is this a function? PLEASE THIS IS URGENT!!!!
trapecia [35]

Answer:

<h2>NO</h2>

Step-by-step explanation:

A function only gives ONE output but that right there gives two!

6 0
4 years ago
In a genetics experiment on​ peas, one sample of offspring contained 376green peas and 150yellow peas. Based on those​ results,
ivanzaharov [21]

Answer:

1a. p0= 0.714

1b The result is not reasonably close to the value of 3/4 that was​ expected

Step-by-step explanation:

1a.Since One sample of offspring contained 376 green peas and 150 yellow peas therefore the probability of getting an offspring pea that is green will be:

Green pea/(Green pea+ Yellow pea)

p0= 376 /(376+150)

p0=376/526

Probability of getting Green pea = 0.714

1b.The result is not reasonably close to the value of 3/4 that was expected.

4 0
3 years ago
Evaluate the function rule for the given value. y = 4 • 2x for x = –6 A. –48 B. 1 divided by 16. C. 1 divided by 8. D. 1 divided
8_murik_8 [283]

Answer:y=-48


Step-by-step explanation:

4*(2*-6)=-48

5 0
3 years ago
How many lines of symmetry does the shape below have
snow_lady [41]
The answer is c I think
5 0
3 years ago
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