Question

1. Evaluate 1/2a^-4 b^2 for a=-2 and b=4
A. 2
B. 1/2
C. 3
D. 4

2. Simplify. Write in scientific notation. (9x10^-3)^2
A. 8.1x10^-5
B. 8.1x10^-4
C. 8.1x10^-3
D. 8.1x10^-6

3. Simplify. Write in scientific notation. 0.5(8x10^5)
A. 8x5^5
B. 4x5^5
C. 8x10^5
D. 4x10^5

4. Write in standard notation. 6.12x10^2
A. 6,120
B. 612
C. 61,200
D. 6.12

5. Write in scientific notation. 0.0042
A. 42x10^-2
B. 4.2x10^-4
C. 4.2x10^-3
D. .42x10^-4

Answer 1

will gladly check your work

Answer 2

Oh, sorry.
D A D B C

Answer 3

Hello? Are they correct?

Answer 4

Redo #1, the rest are correct