Please help with 4 algebra questions!!


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 (1 point)

A)3. 2r^2

B)1. 28r^2/t^-6 ----------------

C)1. 28r^2/t^9

D)0. 8r^2/t^-6