Answer: The maximum length that can be used is 56 inches.
Step-by-step explanation:
Since we have given that
Width of package = 14 inch
Height of package = 12 inch
Let the length of package be 'l'.
Combined length and girth i.e. distance around = 108 inches.
So, According to question, we get that

Hence, the maximum length that can be used is 56 inches.
Answer: 53
Steps:
Multiply to do 1/2x64+21
Reduce the numbers to get 32+21
Add to get 53!
Answer:
The probability density function for the average length of life of the two components is 
Step-by-step explanation:
Exponential distribution:
The exponential probability distribution, with mean m, is described by the following probability density:

In which
is the decay parameter.
Each missile has a length of life governed by the exponential distribution with mean 1 (with measurements in hundreds of hours). Find the probability density function for the average length of life of the two components.
2, each with mean 1 means that 
So the probability density function is:

Your answer should be in my attachment.