Answer:
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.
2yd(3ft/yd)/45ft
6ft/45ft
2/15
The answer to this question is A.
It's a relationship showing the amount of times one value is another.
Answer:625
Step-by-step explanation:21/(3+4)x9-2=25 and 25^2 (squared) is 625
