The total of 3/4 of a fifth grade class finished their work before recess exactly 3/4 of the students who finish before recess did so in 15 minutes or less as shown in the model below

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”?

Shannon drove for 540 minutes. if she traveled 65 miles per hour, how many total miles did she travel?

Walking at a constant rate of 8 kilometers per hour, juan can cross a bridge in 6 minutes. what is the length of the bridge in meters?