Math number systems (1)

if i mention a dot before a no. ,it means the dot is on top of the no.
that one is non- recurring decimal
1. Convert 3.dot0 6 dot3 into fraction .
2. Calculate the value of 0.8 dot3 × 2. dot7 dot2 and express ur answer as a fraction.
3. Consider equation 3x^2-12=0
does the equation on integer,complex imaginary or real(irr or ra?)
u may choose more than 1 answer . and show ur steps.
4. the following statement is incorrect ,illustrate 1 example to show it is incorrect.
In the equation x^2-a=0,if a is rational ,then the equation has a solution in real no.s .