Why are multiple NAND gates used to replace other single function gates? Select one: a. NAND gates are packaged more densely on IC's than other types of gates. b. It is easier to design logic circuits with a single gate type, since you only have to fully understand how one type of gate works. c. NAND gates are cheaper than any other type of gate. d. It makes it possible to use spare portions of NAND IC packages to implement other logic functions, perhaps reducing the total IC package count.

professionals can use many types of technology that can them. some examples are, computers (they research and can use for programs for data, they are also used for job applications, school work, and even to make new ideas), speedometers (can get data for unknown data), sometimes something as small as a pen (used for rough drafts, to insert data, and again job applications).

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.