The image shows a ray of light bending at the boundary of a glass block. According to a law of optics, = n, where n is a constan
t. Which equation states the same law in terms of a and b?
2 answers:
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Let h be the numbers of hours, f be the one-time fee and c the cost charged. The equation is
Since you pay $15 per four, plus the fee. We can solve this equation for the fee:
If we plug c=195 and h=9, we have