Ann bought 2 packages of ground beef. Each package weighed 1 3/4 pounds. When she got home, she divided the ground beef into 1/4pound hamburger patties. How many hamburger patties did she make?

Anyone know? will mark brainliest if correct!

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

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”?