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the fastest recored pitch in MLB was thrown by nolan ryan in 1974. if this pitch were thrown horizontally, the ball would fall 0.809 m by the time it reached the home plate, 18.3 m away. how fast was this pitch?

the book suggests the equation

delta

*y*= -1/2g(delta

*t*)squared

we just started this lesson and i'm really not sure what variable represents what in this problem