729. You just do 9 to the power of 3 or 9^3 and you will get 729. If it is not allowed, the answer is 504.(9 x 8 x 7)
To find the midpoint:
x=3-1/2= 1
y=5+7/2= 6
Step-by-step explanation:
Given the expression:

Follow BODMAS rule.
always evaluate brackets first, followed by multiply or division then addition or subtraction from LEFT to RIGHT.

P(A)=0.2
P(B)=0.3
P(A and B)= 0.2 x 0.3=0.06