Solve the equation.5x2 - 30x + 40 = 0
A. 4 or ?2
B. 2 or ?4
C. 2 or 4
D. ?4 or ?2
Answer: C
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Find the domain and range of the inverse of the given function.f(x) = x4 + 9, x ? 0
A. Domain and range: all real numbers B. Domain: [9, ?); range: [0, ?) C. Domain: (-?, 0]; range: (-?, 9] D. Domain: [0, ?); range: [9, ?)
Find the derivative.y = 
+ 7 sec x
A. y ' = - 
- 7 csc x
B. y ' = - 
+ 7 sec x tan x
C. y ' = - 
+ 7 tan2x
D. y ' = 
- 7 sec x tan x
Indicate the period and the range of the given function.y = 2 sec 
A. P = 2?; Range: 
? 2
B. P = 12; Range: 
? 2
C. P = 12?; Range: 
? 2
D. P = ?; Range: 
? 2
Determine if the function f defined by the set of ordered pairs has an inverse. If so, find the inverse.{(16, 10), (7, 15), (-1, -3)}
A. No inverse B. {(10, 16), (15, 7), (-3, -1)} C. {(10, 16), (-1, 7), (-3, 15)} D. {(16, 15), (16, 7), (-3, -1)}