Answer:
c=42
s=30
Step-by-step explanation:
The answer is the first one 6/7ab
Answer:
128
Step-by-step explanation:
There are 32 50's in 1600.
So 32x4=128
You would probably need a little larger sample of people because not all people wear corrective lenses. In almost any other survey, this would be a scientist’s dream, but in this one, you’d need it to be a little bigger.