IB MAI HL Functions Topic 2.2 Applications of Functions (id: 6102effdc)

本题目来源于试卷: IB MAI HL Functions Topic 2.2 Applications of Functions，类别为 IB数学

[填空题]
When a coin is thrown from the top ofpdhbwo/2 qn (1i,pjr5 a skyscraper, its height above the grouzb).me q:jb-sr,9 s wdnd after t seco,q-.wm )s bzebd9j:s rnds is given by s(t)=$at^2$+bt+c, where a,b,c∈R and s(t) is measured in metres. After 11 second, the coin is 179.3 m above the ground; after 2 seconds, 188.2 m; after 66 seconds, 159.8 m.
1.(1)Write down a system of three linear equations in terms of a, b and c.
(2)Hence find the values of a, b and c. a =    b =    c =   
2.Find the height of the skyscraper. s =    m
3.Find the time it takes for the coin to hit the ground. t ≈   

参考答案:
空格1: -3.2  空格2: 18.5  空格3: 164  空格4: 164±2%  空格5: 10.6±2% 


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