Write the complex conjugate.19i
A. -19
B. 19
C. -19i
D. 19i
Answer: C
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Find all the roots of the complex number. Put answers in standard form.Cube roots of -8j
A. 2j, - 
+ j, - 
+ j
B. 2j, - 
- j, 
- j
C. -2j, 
- j, 
- j
D. -2j, 
+ j, 
+ j
Provide an appropriate response.Find the square root 
if the variable represents a positive number.
A. x4 B. x8 C. x14 D. x2
Solve the problem.Assume it costs 30 cents to mail a letter weighing one ounce or less, and then 28 cents for each additional ounce or fraction of an ounce. Write a piecewise-defined function P(x) that represents the cost, in cents, of mailing a letter weighing between 0 and 3 ounces.
A. P(x) = {
B. P(x) = {
C. P(x) = {
D. P(x) = {
Solve the problem.A retailer knows that n games can be sold in a month if the price is 
dollars per game. If he buys each game for $10, and if he wishes to make a profit of at least 
per month on sales of this game, how many games must he sell each month?
A. 15 ? n ? 25 B. 15 ? n ? 20 C. 20 ? n ? 30 D. 20 ? n ? 50