A hybrid (electric-gasoline) automobile works in either gas only or hybrid mode. The cost to operate the vehicle is $0.20/mile in gas only mode or $40/month plus $0.12/mile in the hybrid mode. The owner must drive how many miles/month to realize savings by driving in the hybrid mode?
TJ test prep practice problems for our students and readers. The problems provide a very small sampling of what Optimal TJ Prep students work with.