Answer:
The answer is B.
Step-by-step explanation:
Hope this helps!
Answer:
30
Step-by-step explanation:
Answer: 40km/h
Step-by-step explanation:
distance = 20km
time = 30 min conver to hours. 
velocity = ?


I imagine that not everyone that visited Becky’s Store spent a lot of time and money there. If she surveys only those that did, this is not a representative sample because she is leaving out other customers. She would have no one in her sample that represents customers who spent a lot of time but no money, or little time and no money or even little time and a lot of money. These are just some examples but clearly her sample is biased.