Ms. li spent $840 on a vacation. she spent 2/3 of the amount on a train ticket and a 1/2 of the remaining amount on food. how much did she spend on the ticket and food all together

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?