13.02 Multiply 12 by 0.085, which is 8.5% in decimal form. You get 1.02. Add that to your original price, 12, and you get $13.02
The illegal values of b are when the denominator equals 0.
So,
gives you (b-4)(b+2)=0
Therefore, b=4 and b=-2, which is answer A.
It is irrational because it is a decimal that doesn't terminate or repeat! :)
4.32×10^6 will be ur answer I believe or 1012 * 534 * 8 = 4323264