Answer:
Step-by-step explanation:
Given is a sample with 4 items as
12,9,14,21
Mean = average of 4 = 14
s is the square root of sample variance
Sample variance is the sum of squares divided by n-1
But Yuri divided by 4 = n instead of 3 = n-1
That is the only mistake he did and all other steps are right.
Answer: 2a^-4 * b^2
length increase by the number of character append to the string. The capacity is increased only when the current capacity is exceeded by the new length
Its D. -14
