Alan needs to earn a B in his Algebra class. His current test scores are 90, 75, 92, and 75. His final exam is worth 4 test scores. In order to earn a B, Alan's average must lie between 80 and 89 inclusive. What range of scores can Alan receive on the final exam to earn a B in the course?
Final exam scores: (Type an integer or a simplified fraction.)
STU