Acomputer screen consists of small rectangular dots called pixels. find the number of pixels on a screen that has 600 rows with 700 pixels in each row. .

Number of pixels = 420000 pixels 

Explanation:
The pixels are covering the whole area of the computer screen. This means that to the number of pixels, we will simply need to get the area of the computer.
Number of pixels = area of computer screen = length * width
Number of pixels = 600*700 = 420000 pixels 

Hope this helps :)

She should use 12/3 to measure