Scientific notation?

1)
-285
= -2.85 x 100
= -2.85 x 10^2

2)
-742.4
= -7.424 x 100
= -7.424 x 10^2

3)
7 x 10^0
= 7 x 1
= 7

4)
4.01 x 10^-1
= 4.01 x 1/10
= 4.01/10
= 0.401

5)
9.07 x 10^-2
= 9.07 x 1/10^2
= 9.07 x 1/100
= 9.07/100
= 0.0907

Scientific notation:
-285 -------- divide and multiply by 100 to keep the value same as – 285
= 285/100 × 100
= -2.85 × 100 = - 2.85 × 10²

-742.4
= -7424/10 ---------- divide by 1000 and multiply by 1000
= -7424/10000 × 1000
= -7.424 × 100
= -7.424 × 10²

= 742.4 x 10^3 --------- wrong

Decimal form:
7.00 x10^0
= 7 × 1 = 7
= 7001--------- wrong

4.01 x 10^-1
= 4.01/10 = 401/1000 = 0.401
= 0.401 ----------- correct

9.07 x 10^-2
= 9.07/100
= 907/1000
= 0.0907 ---------- correct
--------

Scientific notion: both are wrong;
decmal form all the three are wrong .

-285=-2.85*10^2
-742.4=-7.424*10^2
7.00*10^0= 7 remember 10^0=1
4.01*10^-1=0.401
9.07*10^-2=0.0907

/
-7.424x10^2
700.
the rest are correct