Alex drives at an average speed that is 2 5 of the average speed that Roy's train travels. Alex takes 20 minutes to travel 25 km in her car. Roy travels for 2 hours and 15 minutes on his train. How far does Roy travel to 2 dp?

Can someone check my answer? you : )

Farnesene is a sesquiterpene. how many different isomers arising from double-bond isomerizations are possible? g

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.