Factor the perfect square trinomial completely.25k3m - 90k2m2 + 81km3
A. km(5k + 9m)2
B. km(5k - 9m)(5k + 9m)
C. (25k2m + km)(k + 81m2)
D. km(5k - 9m)2
Answer: D
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Find all the roots of the function. Use preliminary analysis and graphing to determine good initial approximations. Round to six decimal places.f(x) = ln(4x) - 4x2 + 2x + 1
A. x ? 0.080253, 1.072435 B. x ? 1.580364, 2.572546 C. x ? 0.302364, 1.294546 D. x ? 0.080364, 1.072546
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
Subtract.0 - 13
A. 0 B. 13 C. -13 D. not possible
Find 
. Write the answer in polar form with the argument between 0° and 360°z1 = 10(cos 30° + i sin 30°), z2 = 5(cos 10° + i sin 10°)
A. 2(cos 3° + i sin 3°) B. 5(cos 20° + i sin 20°) C. 5(cos 3° + i sin 3°) D. 2(cos 20° + i sin 20°)