Solve the problem.Suppose that a radio signal transmission pattern can be modeled by 
for 
where the units are miles. Assume that the positive x-axis points east, and determine the distances of transmission in the east, north, west, and south directions.
A. E: 48 miles, N: 96 miles, W: 48 miles, S: 0 miles
B. E: 48 miles, N: 0 miles, W: 48 miles, S: 96 miles
C. E: 48 miles, N: 48 miles, W: 48 miles, S: 0 miles
D. E: 96 miles, N: 48 miles, W: 0 miles, S: 48 miles
Answer: A
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Solve the problem.A plane is flying at a constant altitude of 6 miles and a constant speed of 400 miles per hour on a straight course that will take it directly over an observer on the ground. How fast is the angle of elevation of the observer's line of sight changing when the horizontal distance from her to the plane is d miles and the plane is moving away from her? Give your answer in radians per hour in terms of d.
A. - 
rads/hr
B. - 
rads/hr
C. - 
rads/hr
D. - 
rads/hr
Translate the phrase; then simplify.Find the sum of 
and 
.
A. 28 B. 24 C. -24 D. -28
Graph.f(x) = -
A. 
B. 
C. 
D. 
Graph the system of inequalities.y > x25x + 6y ? 30
A. 
B. 
C. 
D. 