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[Don't solve/calculate the problem, just set up axes, and make a list of what you know or don't: delta-x, delta-y, horizontal velocity, initial vertical velocity, v sub-y, a sub-y, and t.]

is this correct?:

delta-x = 40 ft

delta-y = 0

horizontal velocity = unknown

initial vertical velocity = ??? [i dunno!]

v sub-y = ??? [i dunno!]

a sub-y = 9.8 [is it positive or negative gravity?]