Answer:
-1
Explanation:
The weight of the cell phone is given by:

The options provided for 'n' are:
a. -3
b. -1
c. 0
d. 1
Applying the possible values:

A cellphone could not possibly weigh as little as 0.0028 or as much as 2.8 or 28 pounds. Therefore, the most reasonable value for n is -1.