Whats the answer for
b. b 9=21?

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose

Ineed on this question me get the answer

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.