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. 9.1 lb/in.2
B. 8.4 lb/in.2
C. 7.8 lb/in.2
D. 11.0 lb/in.2
Answer: A
Mathematics
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Simplify the expression.
A. 1
B. 
C. 
D. 1 - x2
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Evaluate the expression without using a calculator.6251/4
A. 100 B. 3125 C. 20 D. 5
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A geometric sequence is given. Find the common ratio and write out the first four terms.{sn} = 
A. an = 6 ? (2)n-1
r = 2; s1 = 6, s2 = 12, s3 = 24, s4 = 48
B. an = 
(6)n-1
r = 
; s1 = 6, s2 = 12, s3 = 24, s4 = 48
C. an = 6 
n-1
r = 
; s1 = 6, s2 = 3, s3 = 
, s4 = 
D. an = 6 
n-1
r = 
; s1 = 6, s2 = 
, s3 = 
, s4 = 
Mathematics
Using the horizontal-line test, determine whether the function is one-to-one.
A. one-to-one B. not one-to-one
Mathematics