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What is in the middle of 2pi/3 and pi. Also how do you find it and why? Two-digit natural numbers are formed, with replacement, from the digits 0 through 9. How many numbers are greater than 54? Find the derivative of f at x. That is, find f '(x). f(x) = 7x + 8; x = 5 A. 40 B. 8 C. 35 D. 7? Why irrational? The vertices of ∆ABC are A(-2, 2), B(6, 2), and C(0, 8). The perimeter of ∆ABC is- units, and the area is - square units.?