Select the correct answer. What is the pH of a solution with a hydronium ion concentration of 5.6 × 10-7?

(pH = -log[H3O+])

A.
5.6

B.
6.25

C.
7.00

D.
14.40

You are choosing between two health clubs. club a offers membership for a fee of $ 28 plus a monthly fee of $ 20. club b offers membership for a fee of $ 20 plus a monthly fee of $ 22. after how many months will the total cost of each health club be the same? what will be the total cost for each club? in __ months the total cost of each health club will be the same.