Find an for the given geometric sequence.4, -12, 36, -108, 324, . . .
A. an = 4(-3n)
B. an = a1 - 3n
C. an = 4(-3)n - 1
D. an = 4(-3)n
Answer: C
Mathematics
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A. 
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C. 4?
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Factor the following by removing a negative common factor.-20x + 10y
A. -10(2x - y) B. -2(x - y) C. -10(2x + y) D. -10(x - 10y)
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Use the given information to answer the question.The height of a baseball that is thrown from ground level with an initial velocity of 72 feet per second can be modeled by h = -16t2 + 72t. Use this model to find the height of the ball after 2.5 seconds.
A. 280 ft B. 80 ft C. 100 ft D. -80 ft
Mathematics
Estimate the quotient by first approximating the dividend and divisor with numbers that can be divided more easily. 
A. 4 B. 0.4 C. 6 D. 40
Mathematics