exam
Maths Puzzle
Numerical Ability
A chemist mixed a 20% acid solution with a 60% acid solution to make 10 L of a 30% solution. How many liters of the 60% solution were used?
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exam Other Question
How do you graph to graph (x+2)^2+(y+2)^2=9
If sides a and b are known, angle B equals? Now my book says that if we know a and b that A= Tan-1 a/b and also says that B = 90 - A. My problem is 90 - A is not a answer to this