n 1979 the Wincom river was 33 feet below the bridge. Because of silt build up in the river bottom, the river was only 25 feet below the bridge by 1987. Write an equation for the distance of the river from the bridge, d, with t=0 representing 1979. If the silt build up continues at the same rate, what year will the river reach the bridge?

What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x2−9x−3 enter your answer in the boxes.

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.

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180