Perform the indicated operation. Write the result in the form a + bi.
A. 
+ 
i
B. 
+ 
i
C. 
- 
i
D. 
- 
i
Answer: C
Mathematics
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Find the unit tangent vector of the given curve.r(t) = (4 sin3 5t)i + (4 cos3 5t)j
A. T(t) = (4 sin 5t)i - (4 cos 5t)j B. T(t) = (sin 5t)i - (cos 5t)j C. T(t) = (4 cos 5t)i - (4 sin 5t)j D. T(t) = (60 sin 5t)i -(60 cos 5t)j
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Find the total area of the region between the curve and the x-axis.y = 
; 1 ? x ? 4
A. 
B. 
C. 2
D. 4
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Solve the problem.Suppose you pay $1.00 to roll a fair die with the understanding that you will get back $3.00 for rolling 5 or 1. What are your expected winnings?
A. $1.00 B. $3.00 C. -$2.00 D. $0
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Find the least common multiple.x2- 4x- 12, 3x- 18
A. 3(x + 2)(x - 6) B. 3(x - 2)(x + 6) C. 3(x - 2)(x - 6) D. 3(x + 2)(x + 6)
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