Is the number 20,160 prime or composite? Explain.?
A. ?It is prime, because it is odd.
B. ?It is prime, because the sum of the digits is not divisible by 3 or 9 and it is odd.
C. ?It is composite, since the sum of the digits is divisible by 7.
D. ?It is composite, since it is divisible by 7 and 11.
E. ?It is composite, since 7 and 13 are factors.?
Answer: C
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Solve.A wastewater treatment operator uses the formula A = 8.34FC to determine the amount A of chlorine in pounds to add to a basin. The flow F through the basin is in millions of gallons per day, and the desired concentration C of chlorine is in parts per million. If 2200 pounds of chlorine is added to a basin with a flow rate of 10.4 million gallons per day, what would be the resulting concentration?
A. 25.36 ppm B. 19.08 ppm C. 211.54 ppm D. 117.39 ppm
Find the sum of the geometric series.
A. 
B. 
C. 
D. 
State whether the parabola opens upward or downward.y = 5 - (x + 3)2
A. Upward B. Downward
Use the binomial theorem to expand the expression.(x + y)4
A. x4 + 4x3 + 6x2 + 4x + 1 B. x4 + 4x2y2 + y4 C. x4 + 4x3y + 6x2y2 + 4xy3 + y4 D. x4 + 4x3y + 4x2y2 + 4xy3 + y4