a train travels a distance of 1000m along a track. find the work done by the train by applying a force of 15000​

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?