Question 122350
Christine has a solar panel with a width of 21 in. To get the proper inclination for her climate, she needs a right triangle support frame that has one leg twice as long as the other. To the nearest tenth of an inch, what dimensions should the frame have? 
Hint: Do not round your answer(s) until the very end.
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Let one of the legs be "x" inches; Then the other leg is "2x" inches.
x^2 + (2x)^2 = 21^2
x^2+4x^2= 21^2
5x^2 = 21^2
x^2 = 441/5
x^2 = 88.2
x = 9.3915
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Shorter side=9.3915 inches
Longer side= 18.783 inches
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Cheers,
Stan H.