(0.345)(2.1) = can somebody know how to do this?

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c, with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

What is the ratio of the length of an object in yards to the length of the same object in miles?

Landon wrote that 3−2.6=4. which statement about his answer is true?