Identify the number as real, complex, pure imaginary, or nonreal complex. More than one of these descriptions may apply.
A. Complex
B. Nonreal complex
C. Complex, pure imaginary, nonreal complex
D. Real, complex
Answer: D
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Solve the problem.The altitude above sea level of an airplane just after taking off from an airport on a high plateau is given by the linear function y = 800x + 2179, where y is in feet and x is the time in minutes since take-off. Find and interpret the slope and y-intercept.
A. m = 2179; The minutes since take-off increases 2179 for every foot of altitude. 
The minutes that the plane takes to get to the altitude of the airport from sea level.
B. m = 800; The altitude of the airplane increases 800 feet every minute. b = 2179; The altitude of the airport where the airplane took-off is 2179 feet above sea level.
C. m = 2179; The altitude of the airplane increases 2179 feet every minute. b = 2179; The altitude of the airport where the airplane took-off is 800 feet above sea level.
D. m = 800; The minutes since take-off increases 800 for every foot of altitude. 
; The minutes that the plane takes to get to the altitude of the airport from sea level.
Solve the problem.The range R of a projectile is related to the initial velocity v and projection angle ? by the equation 
where g is a constant. How is 
related to 
if v is constant?
A. 
= - 
B. 
= 
C. 
= 
D. 
= 
Convert the units.6515 mL = 
L
A. 65.15 L B. 651,500 L C. 6.515 L D. 6,515,000 L
Solve the problem.A toy rocket is shot vertically upward from the ground. Its distance in feet from the ground in t seconds is given by 
. At what time or times will the ball be 
from the ground? Round your answer to the nearest tenth, if necessary.
A. 10.3 sec B. 1 and 9.3 sec C. 160.1 and 169.9 sec D. 5.2 sec