No. This is not random sampling as the students chose are not chosen at random. Random sampling would be something done where each sample has equal probability of being chosen. Clearly this is not random sampling.
Step-by-step explanation:

Answer:
5400
Step-by-step explanation:
2400+3000
Answer:
cheating in entrance
Step-by-step explanation:
circumference: 14π
area: 49π
<span>Peter paid </span>84 cent in taxs