A) a(t) = 10t + 50, a(10) = 10(10) + 50 = 150 [<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bft%7D%7Bs%5E%7B2%7D%7D%20%20%20" />]
b) <img src="https://tex.z-dn.net/?f=%20%20%5C%20v%28t%29%3D%20%5Cint%5C%20%7Ba%28t%29%7D%20%5C%2C%20dt%3D%5Cint%5C%20%28%7B10t%2B50%7D%29%20%5C%2C%20dt%20%3D%205t%5E%7B2%7D%2B50t%2Bc%20%20" /> <img src="https://tex.z-dn.net/?f=%20v%288%29%3D100%3D5%288%5E%7B2%7D%29%2B50%288%29%2Bc%20%20" /> c = - 620<img src="https://tex.z-dn.net/?f=%20v%28t%29%3D5t%5E%7B2%7D%2B50t-620%20" />
c) <img src="https://tex.z-dn.net/?f=%20v%2815%29%3D5%2815%29%5E%7B2%7D%2B50%2815%29-620%3D1255%20%20" /> [<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Bft%7D%7Bs%7D%20%20%20" />]
d) <img src="https://tex.z-dn.net/?f=%20%20%5C%20x%28t%29%3D%20%5Cint%5C%20%7Bv%28t%29%7D%20%5C%2C%20dt%3D%5Cint%5C%20%28%7B5t%5E%7B2%7D%2B50t-620%7D%29%20%5C%2C%20dt%20%3D%20%5Cfrac%7B5%7D%7B3%7Dt%5E%7B3%7D%2B25t%5E%7B2%7D-620t%2Bd%20%20%20%20%20" /><img src="https://tex.z-dn.net/?f=%20x%2820%29%3D500%3D%20%5Cfrac%7B5%7D%7B3%7D%2820%29%5E%7B3%7D%2B25%2820%29%5E%7B2%7D-620%2820%29%2Bd%20" /><img src="https://tex.z-dn.net/?f=%20d%3D%5Cfrac%7B-31300%7D%7B3%7D%20" />
<img src="https://tex.z-dn.net/?f=%20x%28t%29%20%3D%20%5Cfrac%7B5%7D%7B3%7Dt%5E%7B3%7D%2B25t%5E%7B2%7D-620t-%5Cfrac%7B31300%7D%7B3%7D%20%20" />
e) [img = 10] [ft].