Data Sufficiency (DS) | Re: Is y> -4? (1) (1/7)^(4y) > (1/7)^(8y+14), (2) 4y^2 + 12y < 0

Good question. Just need some careful calculations.

S1:

(1/7)^4y >(1/7)^(8y+14)

Now this can not be directly equated. You will need to write it like this.

(7)^-4y>(7)^-(8y+14)

or

-4y>-(8y+14)

hence y>-3.5

Sufficient

S2:

4y^2 +12y <0

This will give you -3<y<0

hence y >-4

Sufficient

Answer is D

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