Answer:
Step-by-step explanation:
Given that X is the number of months between successive payments
Cumulative distribution function of X is

a) PMF of x would be

b) 
Answer if D hope it helps!
Answer:
━☆゚.*・。゚X>6
Step-by-step explanation:
Here,X is greater than 6
It depends on the shape or figure your trying to find it for.
Area- the area of a flat or plane figure is the number of unit squares that can be contained in it.
Volume- Is the measure of the amount of space in a closed figure.