exam Maths Puzzle Numerical Ability

find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents.

Find the pH of a substance of your choice that is alkaline (

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exam Other Question

how to solve a rational equation like this one 8/x+1/3=5/x Find the equation of an ellipse with its center at (1,2), focus at (6, 2) and containing the point (4,6).

I have so far (x-1)^2 + (y-2)^2 = 1, but I cannot figure out what my a^2 and b^2 should be for my denominators. Please help.