Given: Mean μ = 61.2 and standard deviation σ =21.4
The Z score of the value x=45 is given by
Z = 
Z = 
Z = 
Z = -0.757
The z-score value for 45 rounded to nearest tenth is -0.8
Answer:
B. 
Step-by-step explanation:
Find the missing length by subtracting 5^2-3^2 to get 4^2.
Then do 4^2+7^2 to get 65