Answer:
D. 5 1/8
Step-by-step explanation:
First, convert the mixed number into an improper fraction
8-2 7/8 = 8- 23/8
Calculate the difference
8-23/8 = 41/8
Simplify the fraction
41/8 = 5 1/8
Given:
and 
Finding a common denominator:
9 * 2 = 18
-> If you need to stop here, a common denominator is 18.
Converting :
= 
= 
Converting :
= 
= 
-> and
Answer:
B. 5
Step-by-step explanation:
The code can either be Single letters or 2 letter in alphabetical order
single letter coder are
A
B
C
D
The two letter code are
AB
AC
AD
BA
BC
BD
CD
That is, a total possibility of 10 code which means 4 is not going to work
When E is added then we have AE, BE and the rest . The possibility will be more than 12 so if we have 5 letter then we will have more than enough which means 5 is the answer
I have absolutely no idea but imma gonna guess 14 feet long
