The last picture i sent cut off the questions. can anyone w/ 3 and 4?

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

Two trains leave stations 546 miles apart at the same time and travel toward each other. one train travels at 95 miles per hour while the other travels at 115 miles per hour l. how long will it take for the two trains to meet