Write the number 3.9 in the form a + bi.
A. 3.9 + 0i
B. 3.9i - 0
C. 3.9
D. 3.9i
Answer: A
Mathematics
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Divide. Express the quotient in lowest terms.
÷ 
A. 
B. 
C. - 
D. 
Mathematics
For a person at rest, the velocity v (in liters per second) of airflow during a respiratory cycle (the time from the beginning of one breath to the beginning of the next) is given by
What will be an ideal response?
where t is the time (in seconds).
(Inhalation occurs when v > 0 and exhalation occurs when v < 0.)
Select the graph of this velocity function.
Mathematics
Find the reciprocal.
A. 
B. - 
C. 
D. 
Mathematics
Use addition of y-coordinates to sketch the graph of the function between 
and 
.
?
?
A. ?
B. ?
?
C. ?
D. ?
?
E. ?
Mathematics