4. A circular running track is 1/4 mile long. Elena runs on this track, completing each lap in 1/20of an hour. What is Elena's running speed? Include the unit of measure.

Find the x-intercepts of the parabola withvertex (1,1) and y-intercept (0,-3).write your answer in this form: (x1,if necessary, round to the nearest hundredth.

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

Find each value of the five-number summary for this set of data. [note: type your answers as numbers. do not round.] 150, 120, 136, 180, 158, 175, 124, 162 minimum maximum median upper quartile lower quartile