The number 0.8 can be written as 8/10 is it an irrational number

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%

Solve this problem! extra ! 3025/5.5 = a/90.75 / = fraction

F(x)=5/6x+3 which of the following is true