The purchasing power P (in dollars) of an annual amount of A dollars after t years of 4% inflation decays according to 
. Determine how large a pension A needs to be so that the purchasing power P is $70,000 after 25 years? Round your answer to the nearest dollar.
?
A. $260,683
B. $190,280
C. $115,410
D. $156,191
E. $95,141
Answer: B
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Solve the application problem.A recent advertisement claimed that 2 out of every 7 doctors recommend a certain herbal supplement to increase energy levels. If a local hospital employs 280 doctors, how many doctors would you expect to recommend the supplement? (Round to the nearest whole number, if necessary.)
A. 80 doctors B. 980 doctors C. 3920 doctors D. 40 doctors
Evaluate or simplify the expression without using a calculator.ln e
A. -1 B. 1 C. 0 D. e
Use Gaussian elimination to solve the linear system by finding an equivalent system in triangular form.
A. (0, 3, -3) B. no solution C. (0, 3, 0) D. (0, 0, 3)
Solve the equation.1.5x - 3.4 = 0.8x - 0.32
A. 4.3 B. 4.4 C. -0.227 D. 3.96