Find the interval(s) on the real number line for which the radicand 
is nonnegative.
?
A. 
?
B. 
C.
D.
E.
Answer: C
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Solve the problem.The demand equation for a certain product is P = 35 - 0.004x, where x is the number of units sold per week and P is the price in dollars at which one is sold. The weekly revenue R is given by 
What number of units sold produces a weekly revenue of $60,000?
A. 2340 units B. 14,991,250 units C. 1468 units D. 6410 units
Solve the problem.The time T necessary to make an enlargement of a photo negative varies directly as the area A of the enlargement. If 160 seconds are required to make a 
enlargement, find the time required for a 
enlargement.
A. 504 sec B. 448 sec C. 392 sec D. 560 sec
Use the graph to obtain the graph of the reciprocal function. Give the equation of the function for the graph that you obtain.y = 2 cos 2?x
A. y = 2 csc 2?x
B. y = 2 sin 2?x
C. y = 2 cot 2?x
D. y = 2 sec 2?x
Consider the matrices:I. 
II. 
III. 
IV. 
V. 
Which of them are stochastic matrices?
A. II and IV only B. II, III, and IV only C. all except V D. all except I E. none of these