A man is flying in a hot-air balloon in a straight line at a constant rate of 4 feet per second, while keeping it at a constant altitude. As he approaches the parking lot of a market, he notices that the angle of depression from his balloon to a friend's car in the parking lot is 35°. A minute and a half later, after flying directly over this friend's car, he looks back to see his friend getting into the car and observes the angle of depression to be 36°. At that time, what is the distance between him and his friend? (Give your answer to the nearest foot.)
?
A. 214 ft
B. 221 ft
C. 219 ft
D. 218 ft
E. 216 ft
Answer: D
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Solve the problem.Find the equation of the tangent to the parabola y2 = 27x at the point (9, 9
).
A. y = 
x - 
B. y = 
x + 9
C. y = 
x - 9
D. y = 
x + 
Find the number of subsets of the set.{x | x is an even number between 19 and 37}
A. 256 B. 68 C. 8 D. 512
Provide an appropriate response.A fraction with a numerator that is less than the denominator is called an improper fraction.
A. True B. False
Solve the problem.The population P of a predator mammal depends upon the number x of a smaller animal that is its primary food source. The population s of the smaller animal depends upon the amount a of a certain plant that is its primary food source. If 
and 
what is the relationship between the predator mammal and the plant food source?
A. P(s(a)) = 27a2 + 18a + 14 B. P(s(a)) = 9a2 + 12a + 6 C. P(s(a)) = 9a + 4 D. P(s(a)) = 27a2 + 36a + 14