15 A particle is moving in a straight line with velocity \(\mathrm { vm } \mathrm { s } ^ { - 1 }\) at time \(t\) seconds as shown by the graph below.
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15
- Use the trapezium rule with four strips to estimate the distance travelled by the particle during the time period \(20 \leq t \leq 100\)
15 - Over the same time period, the curve can be very closely modelled by a particular quadratic.
Explain how you could find an alternative estimate using this quadratic.
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