Answer: 49 is a perfect square.
Step-by-step explanation: We say that 49 is a perfect square because it is the product of an integer multiplied by itself, 7×7. If we had a square with an area of 50, this wouldn't be a perfect square because no integer, multiplied by itself, will give a product of 50.
Rewrite as (2^1/2 + 2^1/2)*(18^1/2-2^1/2) = 8
Answer:
3 3/4 or 3.75
Step-by-step explanation:
3/4×5
3×5/4
15/4
3 3/4
3.75
Answer:
Z- score is - 2.21
Step-by-step explanation:
Given that,
Mean = 21.1
Standard deviation = 4.8
sample size (n) = 50
sample mean = 19.6
we want to find, z-score corresponding to mean of 19.6
Z = =-2.21
Z-score is -2.21