Question

$\frac{255}{144} - \frac{ {f}^{2} }{36} = 0$
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Answer 1

Answer:

Step-by-step explanation:

(255/144) - (f^2/36) = 0

(85/48) - (f^2/36) = 0

-(f^2/36) = -(85/48)          (by transposing)

(f^2/36) = (85/48)

(48 * f^2) = (36 * 85)        (by cross multiplication)

f^2 = 3060/48

f^2 = 63.75

f = √63.75                       (by transposing)

f = 7.9843(approx.)

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