The correct answer is 4x10 to the 4th power
Number 1 is:
C and E
Number 2 is:
400
X-2=10
or
10=x-2
this is because it says "2 less than a number is 10" so we can infer that 2 is less than a number (x) so knowing that less than means subtract x-2=10 or you can put it as 10=x-2
X = 7
Is a vertical line that passes through (7,-3).
The probability would be

,
Simplify and turn into ratio.
0.159 : 1.
I am unsure what the full question was though.
Hope this helps.