Given the equation:

You know that a lab technician finds that a sample of fluid has this pH:

Then, in order to find the hydrogen ion concentration of the fluid, you need to follow these steps:
1. Substitute the pH given in the exercise into the equation:

Multiply both sides by -1:

2. Solve for:

Remember that, by definition:

In this case, you can identify that:

Hence, substituting values and simplifying, you get:

Therefore, the answer is:
so 3x2 equals 6 and 0 x 1 equals 0 so 0x6 equals 0 so its zero
Here if it's not what you need to know just let me know I can explain it if need to be
Take the cost and divide it by the pounds
35.99÷15.6 pounds = 2.307051282
= $2.31 per pound (approximately)