The item marked 3 in the accompanying figure is the New Folder button.

Which part of the CPU is specifically designed to perform mathematical operations?

a. fetch module b. ALU c. registers d. cache memory

What is one reason that it is difficult to devise formulas to answer simple questions about a supermarket checkout system?

A. the variability of essential factors B. the regularity in which customers arrive C. because customers always purchase the same number of items D. because the same number of customers are there at all times of the day