You are trying to catch a train, which will be leaving in 2 minutes. there are 2 kilometers between you and the train station. if you managed to catch a car ride to cover the first kilometer and the car's average speed is 60 km/h, what must be your speed of running for the remaining distance to be on time for the train's departure?

Based on the figures as marked, /\rqs = —

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?