I would say that the third one is false.
You can write
1.5
⋅
10
5
=
15
⋅
10
4
15
⋅
10
4
−
8
⋅
10
4
=
(
15
−
8
)
⋅
10
4
=
7
⋅
10
4
Since the power is positive we move the dec.point 4 to the right:
=
70000
Hope it works
Step-by-step explanation:
THE ANSWER IS C. 31 INCHES
√105 is written in simplest form already.
The answer would be D. √105
