Answer:

Step-by-step explanation:
by the definition of negative exponents:
for all
so long as
.
Take away 3 from both sides,
x+3<-2
-3 -3
=x<-5
answer=x<-5
hope this helps.......
I know you're using Khan Academy, anyway the answer is 135 mate.
Your answer would be
12816
I think that the answer is b but I am not sure