Final answer:
To download a 16 GB movie at a download speed of 64 MB/s, it will take approximately 256 seconds.
Step-by-step explanation:
To calculate the time it will take to download the movie, we need to convert gigabytes (GB) to megabytes (MB) and then divide by the download speed.
There are 1024 MB in 1 GB, so the movie is 16 x 1024 = 16384 MB.
Dividing 16384 MB by the download speed of 64 MB/s gives us 16384 / 64 = 256 seconds.