Question

0.5\left(8\cdot 10^5\right) scientific notation

Answer 1

\left(9\cdot 10^{-3}\right)^2 scientific notation

Answer 2

1/2 a^-4 b^2 for a = –2 and b = 4.

Answer 3

0.5(8 x 10^5) in scientific notation is 4 x 10^5.

Answer 4

(9 x 10^(-3))^2 in scientific notation is 8.1 x 10^(-6).

Answer 5

To evaluate the expression 1/2 * a^(-4) * b^2 for a = -2 and b = 4, we substitute the values of a and b into the expression:

1/2 * (-2)^(-4) * (4)^2

=(-2)^(-4) * (4)^2/2

=(-1/16) * 16/2

= -1/2.

Thus, when a = -2 and b = 4, 1/2 * a^(-4) * b^2 = -1/2.