- How many shaded squares will there be in Sierpinski's Carpet at stage (iteration) 9?

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4634 by 20? What is the equation for the line of reflection that maps the trapezoid onto itself? 49^x - 35^x - 25^x = 0. Solve for x. Any ideas.. ? Find the exact length of the curve.
x = 1 + 9t^2, y = 7 + 6t^3, 0 ≤ t ≤ 2? As a storm front moves in, you notice that the column of mercury in a barometer rises to only 732 mm. what is the air pressure?