Henry has 15 lawns mowed out of 60 lawns. what percent of the lawns does henry still have to mow?

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared

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”?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is