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