The graph of a polar equation is given. Select the polar equation for the graph. 
A. r sin ? = 2
B. r = 2
C. r = 4 cos ?
D. r = 4 sin ?
Answer: C
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Solve the problem.Suppose that certain bacteria can double their size and divide every 30 minutes. Write a recursive sequence that describes this growth where each value of n represents a 30-minute interval. Let a1 = 424 represent the initial number of bacteria present.
A. a1 = 424; an = 2 an-1 for n > 1.
B. an = 2 a1 for all values of n.
C. a1 = 424; an = 
an-1 for n > 1.
D. a1 = 424; an = 2 an+1 for n > 1.
Solve the equation using the quadratic formula.x2 + 14x + 34 = 0
A. {-14 + 
}
B. {7 - 
, 7 + 
}
C. {-7 - 
, -7 + 
}
D. {7 + 
}
Differentiate.
f (x) = cos (x)tan (x)
Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62 B. 0.26 C. 0.22 D. 0.50