Answer:

Step-by-step explanation:

Answer:
SSS
Step-by-step explanation:
Only sides are given, not angles, so you know it's side-side-side
Answer:
Radius of the convergence is R = 
and,
The Interval of convergence is 
Step-by-step explanation:
Given function : Σ(21x)^k
Now,
Using the ratio test, we have
R = 
or
R = 
or
R = 
now,
for convergence R|x| < 1
Therefore,
< 1
or

and,
Radius of the convergence is R = 
and,
The Interval of convergence is 
The percentage increase in staff was 60.6%.