Factor the polynomial completely using the grouping method.18y2 + 81y - 45
A. 9(2y + 1)(y - 5)
B. prime
C. (18y - 9)(y + 5)
D. 9(2y - 1)(y + 5)
Answer: D
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The amount of data passing through mobile phone networks doubles each year.
?
A: Explain why the amount of data passing through mobile phone networks is an exponential function of time.
?
B: Use 
for the initial amount of data, and write a formula that gives the amount D of data passing through mobile phone networks after t years.
?
C: If this trend continues, how long will it be before the amount of data is 125 times its initial value? Round your answer to two decimal places.
What will be an ideal response?
Find zw or 
as specified. Leave your answer in polar form.z = 10(cos 30° + i sin 30°)w = 5(cos 10° + i sin 10°)Find zw.
A. 15(cos 300° + i sin 300°) B. 50(cos 40° + i sin 40°) C. 15(cos 40° + i sin 40°) D. 50(cos 300° + i sin 300°)
Graph the parametric equations.x = 1 + 4 sin t, y = 3 + 4 cos t; 0 ? t ? 2?
A. 
B. 
C. 
D. 
Perform the addition.5 + 2.12 + 0.674
A. 2.206 B. 6.446 C. 3.554 D. 7.794