Find the probability. Round to the nearest ten-thousandth when necessary.A family has five children. The probability of having a girl is 1/2. What is the probability of having at least 3 boys?
A. 0.5
B. 0.4688
C. 0.1563
D. 0.3125
Answer: A
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Solve the problem.At time t, the position of a body moving along the s-axis is 
m. Find the body's acceleration each time the velocity is zero.
A. a(20) = 120 m/sec2, a(16) = 20 m/sec2 B. a(10) = -6 m/sec2, a(8) = 6 m/sec2 C. a(10) = 0 m/sec2, a(8) = 0 m/sec2 D. a(10) = 6 m/sec2, a(8) = -6 m/sec2
Find all cube roots of the complex number. Leave answers in trigonometric form.-6
- 6i
A. 
cis 70°, 
cis 190°, 
cis 310°
B. 
cis 70°, 
cis 190°, 
cis 310°
C. 
cis 70°, 
cis 190°, 
cis 310°
D. 
cis 80°, 
cis 200°, 
cis 320°
The graph of a polar equation is given. Select the polar equation for the graph. 
A. r = 6 cos ? B. r = 3 + sin ? C. r = 6 sin ? D. r = 3 + cos ?
Write a formula for the general term (the nth term) of the geometric sequence.
, - 
, 
, - 
, . . .
A. an = 
- 
(n - 1)
B. an = 
n - 1
C. an = 
n - 1 - 
D. an = 
n - 1