If f(x) = x^2 + 16 and g(x) = x + 4, demonstrate which operation(s) would or would not result in a polynomial expression and explain each conclusion.

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

∆red ≅ ∆ by rule will give brainiest if possible