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    What angle of elevation is needed to throw a ball 0.2508 m starting from a height of 1.68 m and at a speed of 1.6 m/s? o
    What angle of elevation is needed to throw a ball 9.007 m starting from a height of 1.62 m and at a speed of 10 m/s? o
    What angle of elevation is needed to throw a ball 0.7923 m starting from a height of 1.74 m and at a speed of 1.3 m/s? o
    What angle of elevation is needed to throw a ball 0.954 m starting from a height of 1.62 m and at a speed of 1.6 m/s? o
    What angle of elevation is needed to throw a ball 9.25 m starting from a height of 1.8 m and at a speed of 9.9 m/s? o
    What angle of elevation is needed to throw a ball 1.616 m starting from a height of 1.7 m and at a speed of 3.2 m/s? o