Answer:
580.
Step-by-step explanation:
The provided information are:
Population mean 
= 500
Population standard deviation 
= 40
z-score = 2
The formula to calculate the z-score is:
x = data item.
The data item can be computed as:
Hence, the data item is 580.
Scientific notation is just a form of the number:
And the format is:
(A number greater than 1 but less than 10) times (10 to the power of x) ,where x can be positive or negative, but not a fraction or decimal
Answer:
0.6
Step-by-step explanation:
Total number of Students are 15
Students scoring above 75% and above are 9
therefore probability of scoring 75% and above are 9/15=0.6
The verbal expression is one eighth times y
12:3 3/10 :5.5 is the answer
