List all the elements of B that belong to the given set.B = {18, 
, -23, 0, 
, 
, 0.68, -8?, 0.999......}Rational numbers
A. 
B. 
C. 
D. 
Answer: B
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Evaluate the exponential expression.-72
A. 49 B. -49
Perform the desired operation. Write the answer in the form a + bi.4(8 - 5i)
A. 8 - 20i B. 32i - 5i C. 32 + 20i D. 32 - 20i
Solve the given inequality (a related function is graphed).x2 + 4x < 2x + 8 
x-intercepts: (-4,0), (2,0)
A. (2, 4) B. [-4, 2] C. (-4, 2) D. (-?, -4) ? (2, ?)
Solve the problem. If necessary, round your result to the nearest tenth unless instructed differently. The precise value of your approximation may depend on the conversion path that you choose.In a certain medium, sound travels at a speed of 5205 feet per second. How many meters per second does sound travel in this medium? Round to the nearest tenth.
A. 17,072.4 m/s B. 2030.0 m/s C. 4736.6 m/s D. 1561.5 m/s