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im assuming that astroman read the question another way, but I'm reading it as 4^a + (3x4^a) = 8 so first factorise LHS 4^a (1 + 3) = 8 4^a (4) = 8 divide both sides by 4 4^a = 2 LHS 4^a is also equal to 2^2a, so 2^2a = 2 from direct comparison 2a = 1 a = 1/2 hope that helps

I've got a question about binders... so im planning to use a bunch of ring binders for yr 11 this year and id like to know what type people used, like the size and the no. of rings. I'm just clueless about the workload and not sure how long a small binder will last before ill need to take the...