Question

Solve it as fast as possible plz....​

Answer 1

Answer:

-157

Explanatin:

$\frac{d(10t^{-2} + 3t - 1)}{dt} = -20t^{-3} + 3 \\t = 0.5 \\-20(0.5)^{-3} + 3 = -160 + 3=-157$