Express In Scientific Notation

[nycmathguy]

College Algebra
Chapter 2
Equations & Inequalities

 

[MathLover1]

120.
32.14=3.214*10

122.
0.00421=4.21*10^-3

144.
21210= 2.121*10^4

126. correct

 

[nycmathguy]

120.
32.14=3.214*10

122.
0.00421=4.21*10^-3

144.
21210= 2.121*10^4

126. correct

1. Where do you see 144?

2. Can you explain why 120, 122, and 124 is wrong?