It causes the breakdown and decay to the rocks. It occurs when the weather water is slightly acidic.
Answer:

Step-by-step explanation:
I got -307 (if the x stands for multiplication)
Answer:
for question 13
- 130
- 50
- 50
- 130
- 130
- 50
- 50
- 130
Step-by-step explanation:
for 14
x. 150
y. 15
z. 150
i cant say that this is totally correct but im taking a educated guess
Answer:
true
Step-by-step explanation: