Answer: letter D. Most of the mass of an atom comes from elctron cloud
Step-by-step explanation: your welcome and have a good day
Answer:

So then the best answer for this case would be:
C. 2.78
Step-by-step explanation:
For this case we have the following probabability distribution function given:
Score P(X)
A= 4.0 0.2
B= 3.0 0.5
C= 2.0 0.2
D= 1.0 0.08
F= 0.0 0.02
______________
Total 1.00
The expected value of a random variable X is the n-th moment about zero of a probability density function f(x) if X is continuous, or the weighted average for a discrete probability distribution, if X is discrete.
If we use the definition of expected value given by:

And if we replace the values that we have we got:

So then the best answer for this case would be:
C. 2.78
Take the root of both sides, and solve.
x = 2i sqrt 2, -2i sqrt 2.
Answer: A quotient is the answer to a division problem. The divisor is the number of parts you divide the dividend by. The dividend is the number you are dividing .
Step-by-step explanation:
Answer:
{x:x is a multiple of 3, x ≤ 15}