A speedboat starts from rest and accelerates at +1.87 m/s2 for 6.50 s. At the end of this time, the boat continues for an additional 6.43 s with an acceleration of +0.656 m/s2. Following this, the boat accelerates at -1.43 m/s2 for 5.34 s. (a) What is the velocity of the boat at t = 18.27 s? (b) Find the total displacement of the boat.(adsbygoogle = window.adsbygoogle || []).push({});

I got the answer to

a)

v=ta

v=6.5*1.87=12.155

v=6.43*.656=4.22

v=5.34*(-1.43)=-7.64

v=8.78m/s @ 18.27sec

b)

i cant seem to figure this out. i am trying displacement =vt, but this is getting me only 160, the answer is 198, but i dont know how to get 198

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# Help with displacement

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