Answer: -1.33 .
Step-by-step explanation:
Formula to find the Z-score :

Given: Mean = 191 and Standard deviation = 21
Then , the z-score corresponding to the expected value of 163 will be :

Hence, the z score corresponding to selling 163 inhalers is -1.33 .
Wow you are doing great sweetie keep up the good work but the answer is 7-1+510
14.1% of 278 is 39.2. So 39.2 megabytes have been downloaded.
Answer:
1/X
Explanation:
X^1 * x^-2
= (x) * (1/x * x)
=1/X
Since its a cube, all sides will be the same.
1×1×1=1cm cubed