Simplify.
- 
A. 8
B. -20
C. -4
D. -4
Answer: D
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Use integration by parts to establish a reduction formula for the integral.
A. 
= - 
sinn-1 x cos x + 
B. 
= sinn-1 x cos x - (n - 1) 
C. 
= sinn-1 x cos x + (n - 1) 
D. 
= - 
sinn-1 x cos x - 
Write the expression in the standard form a + bi.2i15 - i7
A. 1 B. -1 C. i D. -i
Find the probability.A couple has a 
probability of passing on brown eyes to their children. If they have three children, what is the probability that the children will all have brown eyes?
A. 
B. 
C. 
D. 
Rewrite the equation in standard form. Find the center and radius of the circle.x2 + y2 + 6x - 4y - 48 = 0
A. (x + 6)2 + (y - 4)2 = 4 center (-6, 4), r = 2 B. (x - 6)2 + (y + 4)2 = 4 center (-6, 4), r = 2 C. (x + 6)2 + (y - 4)2 = 4 center (6, -4), r = 2 D. (x - 6)2 + (y + 4)2 = 4 center (6, -4), r = 2