Find all specified roots.Cube roots of 1.
A. 1, - 
+ 
i, - 
- 
i
B. -1, 1
C. 1, 
+ 
i, - 
+ 
i
D. 1, 
- 
i, - 
- 
i
Answer: A
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Find the largest open interval where the function is changing as requested.Decreasing f(x) = x3 - 4x
A. 
B. 
C. 
D. 
Translate the statement into a formula.The total distance traveled, d, at a constant speed of 60 miles per hour is the product of the speed and the number of hours traveled, h.
A. d = 60h
B. d = 60 - h
C. d = 
D. d = h + 60
Solve.Find two numbers whose sum is 40 and whose product is as large as possible. [Hint: Let x and 
be the two numbers.Their product can be described by the function 
A. 
and 
B. 20 and 60
C. 19 and 21
D. 20 and 20
Find the square root if it is a real number, or state that the expression is not a real number.- 
A. not a real number B. -6 C. 6 D. -18