Answer:
c
Step-by-step explanation:
x=0
answer x=0
20%
If you see they say that the number decreased is 10% each and they say it two times. we could see that the missing number is as big as the length of two 10% together, so if you add them two you get 20%.
$58.20
600 /200 = 3
3 * 19.40 = 58.20
