IB MAI HL Functions Topic 2.2 Applications of Functions (id: 05cdf255a)

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]
The orbital velocity, v, q;5 jxchi6v)q,9q:kz; z8eis xahae0v 5e;fx of fx )tm2eh5a e-a spacecraft in km/s is given by
$v=−0.0098t+clnR$,where t is the firing time in seconds, c is the exhaust velocity in km/s and R is the mass ratio.
If R=30, find
1.The orbital velocity, v, after a firing time of 150 seconds and an exhaust velocity of 3 km/s. v ≈    km/s
2.The exhaust velocity, c, of the spacecraft traveling at an orbital velocity of 9.5 km/s after a firing time of 150 seconds. c ≈    km/s

参考答案:
空格1: 8.73±2%  空格2: 3.23±2% 


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