exam Maths Puzzle Numerical Ability

Find the hydrogen ion content of a substance of your choice. Using this hydrogen ion content, show how to find the pH of the substance using the formula. Is this substance acidic o

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exam Other Question

A woman had two investments, one paying a 6% dividend. The other is $680 more that the first investment and pays a 5% dividend. If the total return is $102 what is the investments? solve and graph:
8<x+2<13
How do I solve and graph these?

i=prt
Y=mx + b