The formula to calculate standard deviation from probability is \sqrt(n*p*(1-p)). n is the sample size, and 200 in this case (number of putts for practice). p is 80% or 0.8, the probability that he can make it. So the standard deviation is \sqrt(200*0.8*(1-0.8)=\sqrt(200*0.8*0.2)=\sqrt(16)=4.
Answer:
13.5
Step-by-step explanation:
12/4=3
9/3=3
4.5x3=13.5
Yes it determine the length
The slope of this problem is 3/4 same as the rate of change
