Answer:
Step-by-step explanation:
Given that the  mean incubation time for a type of fertilized egg kept at a certain temperature is 25 days.
Let X be the incubation time for a type of fertilized egg kept at a certain temperature is 25 days.
X is N(25, 1)
a) Normal curve is in the attached file
b) the probability that a randomly selected fertilized egg hatches in less than 23 days
=
we convert x into Z score and use std normal distn table to find probability

i.e. we can say only 2.5% proportion will hatch in less than 23 days.
 
        
             
        
        
        
Answer:
Distance between -23 & 17 = 40
Step-by-step explanation:
 
        
             
        
        
        
Answer:
50
Step-by-step explanation:
4,500÷90=50
and to check 
90×50=4500
 
        
             
        
        
        
Answer:
5
Step-by-step explanation:

=
=
=5
 
        
             
        
        
        
Answer: 6 
Explanation
If we divide our figure into six, we get the following figure:
As we can see, we are left with 6 equal parts. This can be confirmed by solving the equation:
