Solve the polynomial equation.3x4 - 10x3 + 20x2 - 40x + 32 = 0
A. x = 
, 2, -4i, 4i
B. x = - 
, -2, -2i, 2i
C. x = 
, 2, -2i, 2i
D. x = 
, 2, -i, i
Answer: C
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Find the amplitude, period, or phase shift of the given function as requested.Find the amplitude of y = 5 sin 3
.
A. 5
B. 15
C. 3
D. 
Solve the problem.The amount of time it takes a swimmer to swim a race is inversely proportional to the average speed of the swimmer. A swimmer finishes a race in 37.5 seconds with an average speed of 4 feet per second. Find the average speed of the swimmer if it takes him 50 seconds to finish the race.
A. 5 ft/sec B. 2 ft/sec C. 3 ft/sec D. 4 ft/sec
Solve the problem.Linda invests src="https://sciemce.com/media/4/ppg__tttt0515191515__f1q124g6.jpg" alt="" style="vertical-align: -4.0px;" /> and 
for one year. Part is invested at 
, another part at 
, and the rest at 
. The total income from all 3 investments is 
. The combined income from the 
investments is the same as the income from the 
investment. Find the amount invested at each rate.
A. $10,000 at 5%; $10,000 at 6%; $5000 at 8%
B. $10,000 at 5%; $5000 at 6%; $10,000 at 8%
C. $8000 at 5%; $10,000 at 6%; $7000 at 8%
D. $5000 at 5%; $10,000 at 6%; $10,000 at 8%
Evaluate the polynomial for the given value.x + 4 when x = 4
A. 8 B. 0 C. 22 D. 16