Each of the following equations has at least one solution EXCEPT A. -2^n = (-2)^-n B. 2^-n = (-2)^n C. 2^n = (-2)^-n D. (-2)^n = -2^n E. (-2)^-n = -2^-n OA A How to approach these questions (A) -2^n is always negative for all values of n, while (-2)^-n is positive for even values and negative for o...

For Statement 1, if x is .4546, then it will round to .455. If we round to the nearest hundredth, then it is .45. If x is .4551, it rounds to .455 as well. If we round to the nearest hundredth, however, it would be .46. Since we can get two different values, S1 is insufficient. S2 is more or less m...

An easy way to solve this more quickly is to realize that any square we can find for one quadrant will have a a corresponding square for each other quadrant. If we focus only on squares that lie predominantly in quadrant 1, we can find 3: 1) (0,0) (10,0) (10,10) (0,10) 2) (0,0) (8,6) (2,14) (-6,8) ...

modulus

|x+2|=|y+2| what is the value of x+y?
(1) xy<0
(2) x>2 y<2
OA not available

Is |x+y|>|x-y|?
(1) |x| > |y|
(2) |x-y| < |x|
OA not available

Why am I not able to apply the allegation in the following question A certain military vehicle can run on pure Fuel X, pure Fuel Y, or any mixture of X and Y. Fuel X costs $3 per gallon; the vehicle can go 20 miles on a gallon of Fuel X. In contrast, Fuel Y costs $5 per gallon, but the vehicle can ...

It seems like everyone has already replied to this thread, but I thought I'd just drop my two cents anyhow :). (A) Not the answer (A) doesn't work because the prompt simply says that wolves CAN double their numbers. It doesn't mean that they always do, even in suitable areas (from the prompt we lea...

letters of the word ‘COMPUTER’

In how many ways can the letters of the word ‘COMPUTER’ be arranged such that vowels occupy even position. [spoiler]If your answer is 4*3*3*2*2*1 then I will want to ask you that why are we not considering the arrangement of consonants. For every arrangement of vowels, we will have 5! arrangemen...

Medical researcher

Medical researcher: As expected, records covering the last four years often major hospitals indicate that babies born prematurely were more likely to have low birth weights and to suffer from health problems than were babies not born prematurely. These records also indicate that mothers who had rece...