Answer:
, 
Explanation:
The total water level lost due to evaporation is directly proportional to the number of day. That is:

Where
is the proportionality constant, which is equal to
. The expression is:

And the total change in water level after 30 days is:


Answer: I think it is A
Explanation: There are millions of lakes in the world. They are found on every continent and in every kind of environment—in mountains and deserts, on plains, and near seashores.
<span>The remaining forms consist of the hardest rock.</span>
I think it’s C but I’m not sure