The purchasing power P (in dollars) of an annual amount of A dollars after t years of 4% inflation decays according to 
. How long will it be before a pension of $60,000 per year has a purchasing power of $30,000? Round your answer to one decimal place.
?
A. 1.0 year
B. 9.7 years
C. 15.8 years
D. 35.7 years
E. 17.3 years
Answer: E
Mathematics
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Solve for x using an equivalent exponential expression.The outside of a water storage tank is in the shape of a sphere. Approximate to the nearest hundredth the volume of the tank with a radius of 13 feet. Use 3.14 for ?.
A. 9,198.11 cu ft B. 707.55 cu ft C. 6,898.58 cu ft D. 530.66 cu ft
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Find the sum.- 8
+ 16
A. 23
B. 7
C. 24
D. 7
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Find all saddle points for the matrix game.
A. Entry a12 and entry a23 B. Entry a12 C. Entry a23 D. No saddle points
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Use a calculator to find the approximate value of the expression rounded to two decimal places.cos 87°
A. 0.10 B. 0.05 C. 0.57 D. 0.52
Mathematics