What differentiates a virus from a worm?

a. a virus infects applications, while a worm logs the keys and passwords typed by a user.

b. a virus makes multiple copies of itself and infects a system, while a worm does not replicate itself.

c. a virus infects applications, while a worm affects emails.

d. a virus infects the system and does not affect applications, while a worm infects both.

e. a virus infects an existing application on a system, while a worm uses the computer network to replicate itself.

Zapper has beginning equity of $257,000, net income of $51,000, dividends of $40,000 and investments by stockholders of $6,000. its ending equity is

Aproperty title search firm is contemplating using online software to increase its search productivity. currently an average of 40 minutes is needed to do a title search. the researcher cost is $2 per minute. clients are charged a fee of $400. company a's software would reduce the average search time by 10 minutes, at a cost of $3.50 per search. company b's software would reduce the average search time by 12 minutes at a cost of $3.60 per search. which option would have the higher productivity in terms of revenue per dollar of input?

Before setting your prices, it's wise to a. subtract your profit margin from your costs. b. research industry standards. c. memorize the formula for cost plus. d. ignore your competitors' prices.