Question

Jada saw a music video that her favorite artist recently posted online the equation u (t) = 320 .4t represents the number of views u , of the video t days since jada saw the video find u (-2) .

Answer 1

Interpret the expression as u(t) = 320(0.4)^t. Then

u(-2) = 320(0.4)^{-2} = 320 / (0.4^2) = 320 / 0.16 = 2000.

So u(-2) = 2000 views.