On a coordinate plane, triangle S T U is shifted 3 units down and 5 units to the left to form triangle S prime T prime U prime. Which rule describes the translation?
(x, y) --> (x - 5, y - 3)
(x, y) --> (x + 5, y + 3)
(x, y) --> (x - 3, y - 5)
(x, y) --> (x + 3, y + 5)

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”?