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C. Suppose f(() is the temperature (in degrees F) of a potato t minutes after it has been placed into a heated oven. You are told that f(10) = 257 and f'(10) =22.5 Which of the following statements is true? a) 11 minutes after it has been placed in the oven, the potato has a temperature of approximately 279.50 F. b) The potato must be increasing in temperature at a constant rate of 22.5 per minute while it is in the oven. c) 10 minutes after it has been placed in the oven, the temperature of the potato is 22.50 F. d) 10 minutes after being placed in the oven, the temperature of the potato is changing at a rate of 2570 F/minute. e) None of the above statements is true. D. If y = f(x) is a differentiable function and f' 8 23 19 - , then which of the following is true? a) The point 23' 19 lies on the tangent line to the graph y = f(x). b) The slope of the graph of y = f(x) is - at the point where x = - 8 19 c) The point 8 6 19 23 lies on the tangent line to the graph y = f(x). d) The slope of the graph of y = f(x) is 8 at the point where x = 6 19 23 e) none of the above