Answer:
Step-by-step explanation:
diameter=7.3cm
radius=
           =
           =3.65cm
angle =120°
area= ×
 × 
= ×
 ×  ×
 ×
=
≅
 
        
             
        
        
        
9 + x > (equal to or greater than) 15
6 more students need to sign up because 15-9=6
        
             
        
        
        
Answer:
37 - 56 lb / ft3
0.6 - 0.9 103 kg / m3
Step-by-step explanation:
The density or hardness of wood varies by species, and the value is necessary to approximate the weight of lumber by volume. In this table, the density of different species of wood is expressed as weight in pounds per cubic foot and kilograms per cubic meter. The density will vary based on the moisture content of the wood.
 
        
             
        
        
        
Answer:
0.6672 is the required probability.             
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 8.4 minutes 
Standard Deviation, σ = 3.5 minutes
We are given that the distribution of distribution of taxi and takeoff times is a bell shaped distribution that is a normal distribution.
According to central limit theorem the sum measurement of n is normal with mean  and standard deviation
 and standard deviation 
Sample size, n = 37
Standard Deviation = 

P(taxi and takeoff time will be less than 320 minutes)

Calculation the value from standard normal z table, we have,  

0.6672 is the probability  that for 37 jets on a given runway, total taxi and takeoff time will be less than 320 minutes.