A firework is shot upward at a rate of 525ft/s. Use the projectile formula h=−16t2+v0t to determine at what time(s), in seconds, the firework rocket is at a height of 800ft. Round your answer(s) to the nearest tenth of a second.

Find the value of the cosine for angle a

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.

Apassenger train and a freight train leave san jose at 3pm, traveling in the same direction. the passenger train is going three times as fast as the freight train. at 6pm they are 240 miles apart. how fast is each travelling? explain your answer and show your