A freight train is half a mile long. It approaches a tunnel traveling 60mi/hr. If the tunnel is 1 mile long, how long will it ta
2 answers:
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Answer:
A) -9/2
B) 9/4
C) -9/2, same as A)
Step-by-step explanation:
We are given that . We use the properties of integrals to write the new integrals in terms of I.
A) . We have used that ∫cf dx=c∫f dx.
B) . Here we used that reversing the limits of integration changes the sign of the integral.
C) It's the same integral in A)