Your grandparents bring you a 1: 800 scale model of the eiffel tower after a trip to paris. the height of the model is 40.5 centimeters. find the actual height x (in meters) of the eiffel tower.

Liam's parents are driving three times as fast as liam is biking, but they left later than he did. if his parents caught up with him two hours after he left, how much later than liam did they leave?

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate. true or false?

There are 93 calories in a small candy bar how many calories are ther in a half dozen small candy bars?