The selling price of a​ refrigerator, is ​$638.00. If the markup is 10% of the​ dealer's cost, what is the​ dealer's cost of the​ refrigerator?

Arectangle plot measure 20ft. by 30ft. a 3-ft.-wide sidewalk surrounds it.find the area of the sidewalk.

Luigi is the first person to finish a 5k race and is standing 13 feet beyond the finish line. another runner, mario, is still running the race and has approximately 24 feet before he reaches the finish line. what is the distance between mario and luigi? explain through words, numbers or pictures how you found the answer.

Ratio of circumference to diameter example plz i need to now what it looks like.