Solve the problem.The formula P = 14.7e-0.21x gives the average atmospheric pressure, P, in pounds per square inch, at an altitude x, in miles above sea level. Find the average atmospheric pressure for an altitude of 2.3 miles. Round your answer to the nearest tenth.
A. 11.0 lb/in.2
B. 8.4 lb/in.2
C. 9.1 lb/in.2
D. 7.8 lb/in.2
Answer: C
Mathematics
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Solve the system mentally, without the use of a calculator or pencil-and-paper calculation. Try to visualize the graphs of both lines.x + 0y = 90x + y = 4
A. x = 9; y = 4
B. x = 4; y = 9
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A. -5, (0, 3) B. 5, (0, 3) C. 3, (0, -5) D. 3, (0, 5)
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Let A = { 6, 4, 1, {3, 0, 8}, {9} }. Determine whether the statement is true or false.{9} ? A
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Mathematics