Question: A particle is moving back and forth in a straight line. Value for its position (in feet) at time t (in seconds) and its velocity

A particle is moving back and forth in a straight line. Value for its position (in feet) at time t (in seconds) and its velocity in feet per second) at time t are s(0)=80; v(0)=2; s(5)=120; v(5)=3; s(20)=50; v(20)=1.5; s(40)=74; v(40)=4. What is the particle's average velocity, in feet per second, on the interval 5

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