$6.20.
2/3=.6666666667
Multiple 9.30 by .6666666667 and you will get the 2/3 cost of the pizza.
The base is 4x.
4x is raised to -2, to 3, and to 9.
When you multiply expressions with the same base, keep the same base, and add the exponents.
-2 + 3 + 9 = 10
Answer: (4x)^10