Answer:
169
Step-by-step explanation:
You need to use a Z-table for this.
There are different tables, in this table i searched for the probability of 97% because that equivalent to the top 3%.
for 0.97, Z = 1.88
The formula of Z is:

Solving x:

Answer:
3,876
Step-by-step explanation:
if you multiply 323 by 12 you get 2,876. Hope this helps!
An expression might be: 2354h / 3hrs. You can make the real division sign if you're using paper. Hope this helped :)