Answer:
0.5
Step-by-step explanation:
Let D be the event of selecting a marble with dots.
Let P be the event of selecting a purple marble.
The probability of selecting a marble with dots, P(D)=0.2
The probability of selecting a marble that is both purple and has dots, 
We want to determine the probability of selecting a purple marble given that the marble has dots on it, P(P|D)
By the definition of conditional probability:

The probability of selecting a purple marble given that the marble has dots on it is 0.5.
Answer:
im pretty sure its C. X=4 but im not positive.
The domain of the function is discrete
Answer:
it is irrational,because the product of an irrational number and a non zero rational number is irrational
Answer:
A square
Step-by-step explanation:
I'm pretty sure its a square