Tara's car accelerated from 10 miles per hour to 70 miles per hour in 12 seconds.

what is the approximate rate of change in the miles per hour that tara's car accelerated?
a) 5 miles per hour per second
b) 8 miles per hour per second
c) 18 miles per hour per second
d) 48 miles per hour per second

Which statement is true about the extreme value of the given quadratic equation? a. the equation has a maximum value with a y-coordinate of -21. b. the equation has a maximum value with a y-coordinate of -27. c. the equation has a minimum value with a y-coordinate of -21. d. the equation has a minimum value with a y-coordinate of -27.