Question

A study claims that your score in a 100- point MATH 11 Exam is solely dependent on the
number of days that you spent preparing for it. According to this research, if you studied
t days, you’ll get t^2-4t+39 points in the exam (for appropriate values of t ). At least how
many days should you prepare for the test in order to get a passing mark?

Answer 1

Ok - in order to solve this problem, we need to know what a passing number of points is.
Is this 70 points?
for a C? @luisaforhappiness

Answer 2

or 60 points for a D?

Answer 3

60 points