[tex]\mu[\tex]=8
[tex]\sigma[\tex]=0.7
x=9
Z=(x-[tex]\mu[\tex])/[tex]\sigma[\tex]
=(9-8)/0.7
=1.43
=1.4 [to the nearest tenth]
Answer:

Step-by-step explanation:
Hi there!
Let
represent "the number".
The sum of a number and seventeen
⇒ 
I hope this helps!
3 is the answer to your question
Answer:
if he attended 9 you would multiply by 3 and get 27
ANSWER
Emma is 44" tall
EXPLANATION
We have that David cast a shadow 42 inches long and he is 66 inches tall.
At that same place and time, Emma cast a shadow of 28 inches.
Since they are at the same spot and time, we can conclude that the ratio of their height to shadow must be the same.
Let Emma's height be x.
The ratio of David's shadow to height is:
42 : 66 or 42 / 66
For Emma, it is:
28 : x or 28 / x
That means that:

So, Emma is 44" tall.