Use the law of cosines to solve the triangle.
5. y=65°, a=5, b=8

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”?

Write 5 in the form of a/b using integers to show it as a rational number

Awoman won a 4000-m race with a time of 12.089 min. what was her rate?