Thomas saved $32. he got $15 more for his birthday. he spent $10 on a movie and new shoes that were $27. how much money does thomas have left?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?