Problems of normally distributed samples are solved using the z-score formula. This is X when Z has a p-value of 1-0.01 = 0.99. So it is X when Z = 2.325.
The level is L = 134.6
The Central Limit Theorem estabilishes that, for a random variable X, with mean and standard deviation, large sample size can be approximated to a normal distribution with a mean and standard deviation
Let, Harry's age - x then Nick is 7x. After 6 years, Harry is x+6 and Nick is 7x+6 So, 7x+6= 5(x+6)=> 2x = 30-6X = 12 In 6 years, Harry will be 12+6 = 18 years (Ans)
By definition the area of a rectangle is: A = l * w Where, l: long w: width So we have to clear the width: w = A / l Substituting the values: w = (234) / (18) = 13 w = 13 feets answer the width, in feet, of the room is 13
