The half-life of an isotope is 1000 years. A 50-gram sample of the isotope is sealed in a box. How long will it take until all of the original sample of the isotope is gone?

Two language majors, anna and megan, took exams in two languages. anna scored 85 on both exams. megan scored 74 on the first exam and 85 on the second exam. overall, student scores on the first exam had a mean of 82 and a standard deviation of 4, and the second exam scores had a mean of 71 and a standard deviation of 13. a) to qualify for language honors, a major must maintain at least an 85 average across all language courses taken. so far, which of anna and megan qualify? b) which student's overall performance was better?

Which of the following is the result of expanding

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*