3. use the law of exponents to evaluate (1/x) ^ -n when x= 7 and n= 2
A. 1/49
B. 1/7
C. 7
D. 49
4. which expression is equivalent to (n^6) ^3
A. n^18
B. n^9
C. n^3
D. n^2
5. which is equivalent to (2x^2) ^3
A. 8x^6
B. 6^6
C. 8x^5
D. 6x^5
6. simplify the expression (-x) ^5 (4x) ^2
A. -16x^7
B. -16x^10
C. -8x^7
D. 16x^10
13. the diameter of the sun is 864,000 miles. how can this value be expressed in scientific notation.
A. 8.64 x 10^5
B. 0.864 x 10^5
C. 86.4 x 10^3
D. 8.64 x 10^ -5