To determine whether a number is written in scientific notation, what test can you apply to the first factor, and what test can you apply to the second factor

any number of the form a.b*10^m is a sc. notation where a,b,m are integers.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0