List down four possible reason why percent yield is usually less than 100%

The recommended daily calcium intake for a 20-year-old is 1,000 milligrams (mg). one cup of milk contains 299 mg of calcium and one cup of juice contains 261 mg of calcium. which of the following inequalities represents the possible number of cups of milk m and cups of juice j a 20-year-old could drink in a day to meet or exceed the recommended daily calcium intake from these drinks alone?

What is another way name for bd? cf, bd, cf, be

Which of the following is not a component of your high school transcripts? a. courses you have enrolled in for the current year b. courses you have completed c. your cumulative gpa d. varsity sports you have played