A golden rectangle is said to be one of the most visually appealing of all geometric forms. The front of the Parthenon, built in Athens in the 5th century B.C. and shown in the illustration, is a golden rectangle. In a golden rectangle, the length l and the height h of the rectangle must satisfy the equation
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If a rectangular billboard is to have a height of 13 feet, how long should it be if it is to form a golden rectangle? Round to the nearest tenth of a foot.
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A. 23 ft
B. 21 ft
C. 21.2 ft
D. 22 ft
E. 20.7 ft
Answer: B
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A. Some photographs are displayed at this exhibition. B. All photographs are displayed at this exhibition. C. No photographs are displayed at this exhibition. D. All photographs are not displayed at this exhibition.
Find an equation of the line.
A. x = - 
B. y = - 
x
C. y = - 
D. x = 
Simplify. Write the answer using positive exponents only. Leave the answer in exponential notation.
-5
A. 
B. 
C. 
D. 
Solve the differential equation subject to the initial condition.2 
- 4xy = 8x; y(0) = 20
A. y = 2 + 20ex2 B. y = -2 + 22e-x2 C. y = -2 + 22ex2 D. y = -1 + 21ex2