APA is quite tough...

One of APA chapters is quite tough, formula is given but e problem is must know which one 2 use. I understand how 2 do but teacher say all must convert 2 meter, e conversion made me a bit confuse i try my best 2 do n solve it. APA compare to math is quite even both got calculation. One of APA question got simultaneous same like math. Tat y 2day my APA teacher got through all e tutorial question n solve e solution.