Solve. Remember to insert units when writing your answer.The sediment on the bottom of a creek is normally 28 cm thick, but a recent flood washed away 
of sediment. How thick is it now?
A. 27.91 cm
B. 271 cm
C. 19 cm
D. 27.1 cm
Answer: D
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Solve the triangle. Round to the nearest tenth when necessary or to the nearest minute as appropriate.B = 15.8°C = 102.9°b = 33.7
A. A = 61.3°, a = 110.6, c = 122.6 B. A = 59.3°, a = 122.6, c = 110.6 C. A = 59.3°, a = 120.6, c = 108.6 D. A = 61.3°, a = 108.6, c = 120.6
Use an identity to write the expression as a single trigonometric function or as a single number.2 cos2 22.5° - 1
A. 
B. 
C. 
D. 
Solve the problem.If two resistors are connected in parallel, the total impedance is given by ZT = 
. Find the total impedance, ZT, when the impedances Z1 = (-1 + 2i) ohms and Z2 = (1 + 5i) ohms are in parallel. 
?Parallel Circuit
A. 
ohms
B. 
ohms
C. 
ohms
D. - 
ohms
Use the graph to solve the following equation.
A) x=0
B) x= –1
C) x= 1
D) x= –2
E) x= –3