Solve the right triangle shown in the figure. 
?A = 45°, 
= 14 km, ?C = 90°
A. 
= 14 km, ?B = 45°, 
= 7
km
B. 
= 14
km, ?B = 45°, 
= 14 km
C. 
= 7
km, ?B = 45°, 
= 14 km
D. 
= 14 km, ?B = 45°, 
= 14
km
Answer: D
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Use implicit differentiation to find dy/dx and d2y/dx2.x2 + y2 = 5, at the point (2, 1)
A. 
= - 2; 
= -5
B. 
= - 
; 
= 0
C. 
= 2; 
= 5
D. 
= - 2; 
= 1
Evaluate the expression for the given values.
(a) m = 5, n = 5(b) m = 5, n = 20(c) m = 6, n = 3
A. (a) 0
(b) undefined
(c) 
B. (a) 0
(b) undefined
(c) 
C. (a) undefined
(b) 0
(c) 
D. (a) undefined
(b) 0
(c) 
Is the set {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10} a group for multiplication modulo 11? ? ?
A. No B. Yes
Solve the problem.The radiator in a certain make of car needs to contain 
of 40% antifreeze. The radiator now contains 
of 20% antifreeze. How many liters of this solution must be drained and replaced with 100% antifreeze to get the desired strength?
A. 15.0 L B. 24 L C. 20.0 L D. 30 L