Derek collects quarters that have the names of the 50 u. s. states on them. he has collected 13 different state quarters in 2.25 months. at this rate, how long will it take him to collect all 50?

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.

What is the approximate mark up percentage rate before m equals $1740 marked up from p equals $19,422

Sections of prefabricated wood are each 5 1/3 feet long. how long are 7 1/2 sections placed end to end?