Answer:
3/15 or 1/5
Step-by-step explanation:
There are 15 plants total and 3 of those plants are 21m tall, thus divide 3 by 15 to get the probability
The answer i got was
n=-3/4,n=-1
For 6: 12, 18, 24, 30, 36
For 9: 18, 27, 36, 45, 54
For 7: 14, 21, 28, 35, 42
The answer would be mercury.