Answer:
D) 0.42 + 0.17 x = 0.93
Step-by-step explanation:
0.93 - 0.42 = 0.51
0.51 / 0.17 = 3
3 ounces and the answer is D
 
        
             
        
        
        
You have to distribute the exponent of 4 to the whole equation. 
so step one is to distribute to the 3
3^4= 81
then we have to distribute to the x
x^4
then to the 2
2^4= 16
81 * x^4 * 16
* = multiplication sign
        
             
        
        
        
Assuming a normal distribution  we find the standardized z scores for  a:-
z1 = (80 - 180)  / 25  =  = -100/25  = -4
z2 =  (280-180) / 25  =  4
Required P( -4 < z < 4)  from the tables is  >99.9%
b
z1 = 130-180 / 25 =  -2
z2 =  230-180 / 25  = 2
from tables probability is 2* 0.4773  =  95.46 %