Answer:
k=18
Step-by-step explanation:
have a good day :)
Radius r = 6 in
so area A = 6x6xπx0.5 = 18π
note: a semicircle is just half of a full circle:)
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:
Answer:
subtract 6.5 by 9.75
Step-by-step explanation:
9/12 =.75
6/12=.5
9.75-6.5=3.25
hope this helps
°_°