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## Homework Statement

An athlete executing a long jump leaves the ground at an angle of 30 degrees and travels 8.90m. What was the take-off speed?

## Homework Equations

d(vertical)=(vi)(t) + 0.5at^2

## The Attempt at a Solution

0=Vsin30t + (0.5)(-9.8)(t^2)

I cannot solve for two separate variables, how can I solve this problem?