Answer:

Explanation:
Diana's age is d.
Carol is 3 years younger than half of her sister Diana's age.
Carol's age =
Where d is Diana's age.

Hence, Carol's age is
.
Answer:
get some crickets or sum and lure them in
Answer:
I think that the answer is E
Explanation:
Definitely cell phone reception! However books could be argued for since they also are a good more than a necessity. However the last 2 i believe would be classified more as necessities than goods.
~Hope this helps!~
Answer:
c) thermal pollution
Explanation:
aka heat pollution, occurs when heat released into water or air produces undesirable effects.