Just use the order of operations. PEMDAS, parentheses, exponents, multiplication, division, addition and subtraction.
In the first problem 2 + 6*3^2, there are no parentheses, so next would be exponents.
There is an exponent so you do that first.
3^2 = 9
Now we have 2 + 6*9
Multiplication is next and it is in the problem, so we do 6*9 = 54
So now we have 2 + 54 which equals 56.
$104,880?
Pretty sure this may be the answers. If not what are the answer choices?
It is centered at (h,k) --> (0,0) and has a radius 9
The equation of the circle is

Hope that helps!
The unknown number is X;
x/6+2=9;
X/6=7;
X=42;
The answer is 42