Answer:
The mean of the random variable is 0.
The variance of the random variable is 
Step-by-step explanation:
We are given the following probability distribution:





Mean:
Sum of each value multiplied by its probabilities. So

The mean of the random variable is 0.
Variance:
Sum of the difference squared between each value and the mean, multiplied by its probabilities. So

The variance of the random variable is 
Answer:
A.
Step-by-step explanation:
The height of statue is 12.2 inches in Troy's drawing.
Step-by-step explanation:
Given,
Actual height of statue = 305 feet
Scale used by Troy;
25 feet = 1 inch
1 feet = 
305 feet = 
305 feet = 
305 feet = 12.2 inches
The height of statue is 12.2 inches in Troy's drawing.
Keywords: unit rate, division
Learn more about unit rate at:
#LearnwithBrainly
estimate the the nearest half....
5/8....it is closer to 4/8(which is 1/2) then it is to 8/8(which is 1)...so we will round 5/8 to 1/2
8/9....it is closer to 9/9 (which is 1) then it is to 4.5/9 (which is half)...so we will round 8/9 to 1
" the product " means multiply
so 1 * 1/2 = 1/2 (or 0.50) <== estimate
actual : 5/8 * 8/9 = 5/9 (or 0.55) <== actual