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first one is

A golfer can hit a golf ball a horizontal distance of over 300 m on a good drive.

What maximum height will a 318.3m drive reach if it is launched at an angle of 15 degrees to the ground? Answer in M

A shell is fired from the ground with an initial speed of 1.60x10^3 m/s at an initial angle of 41 degrees to the horizontal

a)Find the shells horizontal range

258418.579

b)How long is the shell in motion? Answer in s.

I don't know this one. If someone can give me quick help I will deeply appreciate it. The homework is due 11 pm CT