For the demand function given, find the elasticity at the given price and state whether the demand is elastic, inelastic, or whether it has unit elasticity.q = D(x) = 300 - 4x; x = 62
A. 
; inelastic
B. 
; inelastic
C. 52; elastic
D. 
; elastic
Answer: D
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Perform the indicated operation without the use of a calculator and express each answer in decimal notation.
A. 0.00142857 B. 700 C. 100 D. 0.07
Use the information given about the angle ? to find the exact value of the indicated trigonometric function.cot ? = -3, sec ? > 0Find cos 
.
A. -
B. -
C. 
D. 
Solve the problem.The temperature of water in a certain lake on a day in October can be determined by using the model 
where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, at what depth is the water 9 degrees? (Round to the nearest foot.)
A. 67 ft B. 12 ft C. 45 ft D. 30 ft
Use the square root property to solve the equation.(x + 6)2 = 40
A. {-2
, 2
}
B. {2
- 6, 2
+ 6}
C. {-6 - 2
, -6 + 2
}
D. {-6 - 2
, -6 + 2
}