Using a modem, with a speed of 14400 bps for 3 minutes. an image containing 256 colors was transmitted.

Using a modem, with a speed of 14400 bps for 3 minutes. an image containing 256 colors was transmitted. Count the number of dots in this image.

1) Find the amount of information in the image: 14400 bit / s * 180 s. = 2592000 bits
2) The image contains 256 colors. 256 = 2 ^ n => n = 8.8 bits per pixel.
3) Find the number of pixels by dividing the amount of information in the image by the amount of information allocated per pixel. 2,592,000 bits / 8 bits = 324,000.
Answer: There are 324,000 pixels (dots) in the image.