Question

PLEASE HELP?! I GIVE MEDALS

6. Simplify. Write in scientific notation. (9 × 10^3)^2 (1 point)
A)8.1 × 10^5
B)81 × 10^4
C)81 × 10^3
D)8.1 × 10^6

7. Evaluate 1/2a^4b^2 for a = –2 and b = 4. (1 point)
A)2
B)1/2
C)3
D)4

8. Is the following statement always, never, or sometimes true?

A number raised to a negative exponent is negative. (1 point)
A)always
B)never
C)sometimes

9. Simplify (4xy^2)^3(xy)^5 (1 point)
A)64x^8y^11
B)64x^15y^30
C)12x^2y^11
D)12x^8y^11

10. Simplify (2t^3)^3(0.4r)^2 (