AP Statistics - Unit 1 Progress Check MCQ Part A latest solution A+ QUALITY

AP Statistics - Unit 1 Progress Check MCQ Part A latest solution A + QUALITY The function f is given by f(x)=0.1x4 −0.5x3−3.3x2+7.7x −1.99. For how many positive values of b does limx →bf(x)=2 ? - C. Three A particle is moving on the x -axis and the position of the particle at time t is given by x(t), whose graph is given above. Which of the following is the best estimate for the speed of the particle at time t=8 ? - A. 0 A rocket leaves the surface of Earth at time t=0 and travels straight up from the surface. The height, in feet, of the rocket above the surface of Earth is given by y(t), where t is measured in seconds for 0 ≤t≤600. Values of y(t) for selected values of t are given in the table above. Of the following values of t, at which value would the speed of the rocket most likely be greatest based on the data in the table? - D. t=400 The position of a particle moving to the right on the x -axis is given by x(t), where x(t) is measur ed in inches and t is measured in minutes for 0 ≤t≤100. If y=x(t) is a linear function, which of the following would most likely give the best estimate of the speed of the particle, in inches per minute, at time t=20 minutes? - D. The slope of the graph of y=x(t) Let f be the function given by f(x)=e2x −1x. Which of the following equations expresses the property that f(x) can be made arbitrarily close to 2 by taking x sufficiently close to 0, but not equal to 0 ? - C. limx→0f(x)=2limx →0f(x)=2