Answer:
d. empty or null set is the answer
Decrease in the price is = 320 - 240 = 80
So, percentage will be: 80/320 * 100 = 25%
So, option A is your answer.
Hope this helps!
Answer: I believe it is C
Step-by-step explanation:
Answer: 4.5 3.2 6.7
Step-by-step explanation: