Question

the table shows the name of each volunteer and the height of the baby elephant each volunteer measured. which volunteer measured the tallest elephant

Answer 1

So in order to compare, the measurements have to same units.  So lets convert everything to feet. 

George  2 yds = 6 ft            Kelsey  68 inches = 5 ft 8"

Mariah  5 feet                       Brian  5 ft 10 "

George measured the tallest at 6'   

Hope this helped.