a cell phone weighs about 2.8×10^n pounds. which value of n is most reasonable?\n-3\n-1\n0\n1
a cell phone weighs about 2.8×10^n pounds. which value of n is most reasonable?\n-3\n-1\n0\n1
Answer
Explanation:
Step1: Consider the weight of a cell - phone
A cell - phone is a relatively light object. In scientific notation, we know that (a\times10^{n}), where (1\leqslant a<10). A cell - phone weighs a few ounces or a fraction of a pound.
Step2: Analyze each option
If (n = - 3), then (2.8\times10^{-3}=0.0028) pounds. This is a very small weight but is in the reasonable range for a cell - phone. If (n=-1), then (2.8\times10^{-1} = 0.28) pounds which might be a bit heavy for a typical cell - phone. If (n = 0), then (2.8\times10^{0}=2.8) pounds which is too heavy. If (n = 1), then (2.8\times10^{1}=28) pounds which is extremely heavy for a cell - phone.
Answer:
-3