Question

2. Simplify (2t^–3)^3(0.4r)^2

Thanks

Answer 1

You have:\[(2t^{–3})^3(0.4r)^2 \]So this is:\[2^3(t^{-3})^30.4^2r^2\]
Of course, 2³=8 and (0.4)²=0.16.
8*0.16=1.28, so that's fine.

I see two problems in your answer:

1. t^-6 remember: (a^b)^c=a^(b*c), so...

2. "over" if you want to make a fraction with t in the denominator, you'll lose the - of the exponent.

Answer 2

my answer choices are

3.2r^2
1.28r^2/t^-6
1.28r^2/t^9
0.8r^2/t^-6

Answer 3

3.2r^2