Can anyone check to see if the answers/calculations I got (they are in orange) are right? Thank you!

4. Calculate the launch velocity needed to successfully land the cannon ball at each distance, given the following conditions: launch angle (:9) was 27.5", the launch height (yJ) was 9.59 m, the height of the landing pad (31:) was 2.50 m, and the range (R) is the cannon-landing site distance. \"i = cos(9) 2[R tan(9) (y, yi)] Cannon landing site Launch Velocity (m/s) distance (m) 68 \"26.04 m/s 75 "27.57 m/s 245 \"52.72 m/s 5. Suppose that the experiment was performed with a cannonball launched at an initial velocity of 30 m/s. What is the distance (R) to the landing site? Note that the launch angle (6) was 27.5\