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  1. ...motion by  x(t) = 20t - 20. The distance between the boats obeys r ^2 = x^2 + y^2, or 2r dr/dt = 2x dx/dt + 2y dy/dt, so dr/dt will be zero only when...

    1 Answers · Science & Mathematics · 26/02/2021

  2. ... 63000 * 5280 = 332,640,000 The formula for arc length is s = r Radius is half the diameter r = d/2 = 2/2 = 1 Plug in the...

    1 Answers · Education & Reference · 26/02/2021

  3. angular speed ω = 2PI/60*n = 0.10472*470 = 49.22 rad/sec  tangential speed Vt = ω* r = 49.22*0.045 = 2.21 m/sec  distance d = Vt*t = 2.21*8*60 = 1063 m (1100 with just 2 sign. digits)

    3 Answers · Science & Mathematics · 26/02/2021

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