Final answer:
Andrew's laptop has a processor speed of 2.8 GHz, which rounds up to 3 GHz.
Step-by-step explanation:
The processor speed of Andrew's laptop, which operates at 2.8 gigahertz (GHz), when rounded to the nearest whole number, is 3 gigahertz (GHz). Rounding involves looking at the digit to the right of the digit you want to round to, which, in this case, is the tenths place since we're rounding to whole numbers. Since the digit in the tenths place is 8, you would round up the number 2.8 to 3 gigahertz.