exam Maths Puzzle Numerical Ability

find the domain of the f(t) = log(t - 5)

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exam Other Question

Arianne is mixing a solution for Chemistry class. She has a 25% copper solution and a 50% copper solution. How much of each should she mix to max 1000ml of a 45% solution how do u solve this porblem?

(r+s)^2+(r-s)^2