A trough contains a certain amount of sand. After Jamie used it to fill a 2.4-kilogram bag, a 650-gram bowl, and a 3-kilogram,125-gram pail, she realized that she had a kilogram of sand left in the trough. How much sand was in the trough at first? Give your answer in grams, using a comma.

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Which expression is not a polynomial?