he function y=4(6)^t

To find the number of people who have watched the video after 3 days using the function \( y = 4(6)^t \), we can substitute \( t \) with 3:

\[
y = 4(6)^3
\]

Now calculate \( (6)^3 \):

\[
(6)^3 = 6 \times 6 \times 6 = 216
\]

Next, multiply that by 4:

\[
y = 4 \times 216 = 864
\]

Therefore, the number of people who have watched the video after 3 days is **864**.