Answer:
The altitude to the base of an isosceles triangle bisects the vertex angle of the triangle.
Step-by-step explanation:
 
        
             
        
        
        
Answer:
Proportion of all bearings falls in the acceptable range = 0.9973 or 99.73% .
Step-by-step explanation:
We are given that the diameters have a normal distribution with a mean of 1.3 centimeters (cm) and a standard deviation of 0.01 cm i.e.;
 Mean,  = 1.3 cm            and           Standard deviation,
 = 1.3 cm            and           Standard deviation,  = 0.01 cm
 = 0.01 cm
Also, since distribution is normal;
                  Z =  ~ N(0,1)
 ~ N(0,1) 
Let X = range of diameters
So, P(1.27 < X < 1.33) = P(X < 1.33) - P(X <=1.27) 
   P(X < 1.33) = P(  <
 <  ) = P(Z < 3) = 0.99865
 ) = P(Z < 3) = 0.99865
   P(X <= 1.27) = P(  <
 <  ) = P(Z < -3) = 1 - P(Z < 3) = 1 - 0.99865
 ) = P(Z < -3) = 1 - P(Z < 3) = 1 - 0.99865
                                                                                             = 0.00135
  P(1.27 < X < 1.33) = 0.99865 - 0.00135 = 0.9973 .
Therefore, proportion of all bearings that falls in this acceptable range is 99.73% .
 
        
             
        
        
        
Answer:
Step-by-step explanation:
3 * 1/2 * 5 * 4.5
= 33.75 fT^2.