Answer:

Step-by-step explanation:
Let the greatest common factor of
such that
and they are not all equal to zero,
is the common divisor of
and
. Therefore,
and 
You can write


The greatest common factor of
is given as

and

This happens because
is upper bounded because if
then 
for all
. Therefore, the set
has the greatest elements.
Taking
such that 
You can note that
and 
Therefore, the greatest common factor is 
Note: 
Answer:
8
Step-by-step explanation:
The shortest leg warmer:
4.5
The longest leg warmers:
6 and 6.5
6 + 6.5 = 12.5
12.5 - 4.5 = 8
Answer:
0.925 or 92.5%
Step-by-step explanation:
y=a(1-b)^x
decay factor is 1-b <- and the part we care about
b is 7.5%=0.075
1-0.075
=0.925
I'm a little rusty on exponential rates, but I hope this helps!