- Determine whether the set of all polynomials of degree <= 4 form a vector space?

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Calculate the pH of 0.0211 butanoic acid, Ka=1.52 x 10-5. Answer in 4 significant figures.? Is zero a number? 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? Two-digit natural numbers are formed, with replacement, from the digits 0 through 9. How many numbers are greater than 54? What is the component concentration ratio, [BrO−]/[HBrO], of a buffer that has a pH of 8.75 (Ka of HBrO = 2.3 × 10−9)?