Answer:
r= 15
Step-by-step explanation:
Part A. Riley and Louie each have $5,000 to invest. They both invest at a 2.5% simple interest rate.
Part B. Riley keeps her money invested for 7 years. How much interest will she earn?
Part C.After those 7 years how much will her investment be worth?
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.