D.The results could be flawed due to non-response of patients.
Answer:
r = 
Step-by-step explanation:
The common ratio (r) in a geometric sequence is any term divided by the previous term, that is
r =
=
= 
Answer:
C
Step-by-step explanation:
x-coordinate is positive while the y-coordinate is negative
Answer:
Each pizza cost $8.50
Step-by-step explanation: