There are two roller coasters that have cars travelling at the same time. The heights of the coasters are modelled during 5 seconds. The height of the first coaster in metres is modelled by h(t) = ³ - 61² +281-10. The height of the second coaster in metres is modelled by h(t)=t+14t-2. At what times are the two coasters at the same height? 2s, 4s, and 6s 3s, 4s and 5s 1s, 2s and 3s 1s,2s and 4s

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