which of the following correctly use the power role of exponents in the expression (10^9)^7
A: 90^7
B: 10^16
C:10^2
D: 10^63
The correct answer is D: 10^63.
To simplify the expression (10^9)^7 using the power rule of exponents, you multiply the exponents.
So, (10^9)^7 = 10^(9*7) = 10^63.