C is correct because absolute value cant be negative.
D
If your pH is lower, it has more Hydronium ions
As a rule, for every decrease in pH, there is 10 times more H3O+ so since it is 4.1 there should be a bit more than 10^4. So it has to be D
Answer:
20$ each visit
Step-by-step explanation
Divide 40 by 2 for her 2 visits to the bank

<em>Final Answer: </em>
(A) I got 10(10)=100 points in remote space.
(B) I also got 10(9)=90 points in remote space