+15 A railroad crew can lay 7 miles of track each day. They need to lay 196 miles of track. The length, L (in miles), that is left to lay after d days is given by the following function.
L(d)=196-7d
(a) How many miles of the track does the crew has left to lay after 18 days?
(b) How many days will it take the crew to lay all the track?
+23246 To solve part (a): replace d with the value 18 and finish: L(d) = 196 - 7 · 18 [finish this]
To solve part (b): replace L(d) with 0 and solve for d: 0 = 196 - 7d [finish this]
+15 another unrelated question has been deleted. (Melody)
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https://web2.0calc.com/questions/some-guidlines-for-question-askers
