exam Maths Puzzle Numerical Ability

help please
solve the rational inequality (x-2)/(x+3) is less than or equal to 0

is it: (-3,2] (-oo,-3) (-oo,-3)U{2,oo) or [2,oo)
i am very confused

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exam Other Question
Hi! I need some help to simplify and all exponents should be positive.

(2^-1a^2b)^-3
------------
4a^-9


and

(3x4y^3-5y)-(2x+3y^3-5y)
 If the alternate hypothesis states that  does not equal 4,000, what is the rejection region for the hypothesis test?
A) Both tails
B) Lower or left tail
C) Upper or right tail
D) Center
E) None of the above