Question: 3. A man programs his sprinkler system using the equation 15 sin (kr), where i is in seconds. If he wants it to have a

3. A man programs his sprinkler system using the equation 15 sin (kr), where i is in seconds. If he wants it to have a period of - s, what should k be? C/1 4. The height of a ball is modelled by the equation h(t) = 3 sin(6nt) + 4.5 where h(1) is in metres and t is in seconds. What are the highest and lowest points the ball reaches? C/2

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