The last answer, because the class is being divided into four groups. So the class number is not known, thus it is represented by “w” and divided by four.
Downloaded Photomath it’s going to help you a lot, and show you step by step, also it’s free.
-20+1= -19
-19/2= -9.5
Check:
-9.5x2= -19
-19-1= -20
Your answer is going to be
23% :)
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
