exam
Maths Puzzle
Numerical Ability
Using the formula pH = -log[H+], show me how to find the hydrogen ion content of coffee when the pH level is 5.0
Write answer in scientific notation including units.
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exam Other Question
An amount of money is invested at 4% annual simple interest, and twice that amount is invested at 5%. The total annual interest is $112. How much is invested at each rate?
Please help me with square root. I must see how it is done. I have more to do.
sqrt7(2sqrt3+3sqrt7)
Many thanks