The formula for the maximum focus range or hyperfocal distance, H, of a camera is given by H=L^2/f x c , where L is the focal length of the lens, f is the setting on the camera to reduce or enlarge the aperture, and c is the diameter of the circle of least confusion. The formula can be rewritten to solve for L as L = f x c/H^2.

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Which expression is equivalent to the expression below? (6c^2 + 3c) / (-4c + 2) / (2c + 1) / (4c - 1)a. 3c(2c-1) / (2c + 1)b. -3c(2c-1)^2 / (2c + 1)^2c. 3cd. -3c(just took the test its d. -3c)

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.

When you answer this can you explain