Because each pixel requires three bytes, a 3.1 megapixel 32-bit bitmap would require approximately a ____ megabyte file.
A) 10
B) 100
C) 1000
D) 10000

Question

Quizplus · Accepted Answer

To calculate the file size of a bitmap image, you need to multiply the width and height in pixels by the number of bytes per pixel. Since this is a 32-bit bitmap, each pixel requires 4 bytes (32 bits / 8 bits per byte). Therefore, the total file size would be:

3.1 megapixels x 4 bytes per pixel = 12.4 megabytes

However, the question asks for the file size in megabytes, not megabits. Since 1 byte = 8 bits, we need to divide the result by 8:

12.4 megabytes / 8 = 1.55 megabytes

Rounding up to the nearest tenth, we get approximately 1.6 megabytes, which is closest to choice A (10).

Because Each Pixel Requires Three Bytes, a 3