The Internal Revenue Service (IRS) establishes a tax ceiling on reimbursement for business travel by car. The IRS ordinarily updates the mileage rates once in each calendar year; however, on occasion a special adjustment has been made within the year due to changed costs.
Figure 10h-2: Structure of the Earth's crust and top most layer of the upper mantle. The lithosphere consists of the oceanic crust, continental crust, and uppermost mantle. Beneath the lithosphere is the asthenosphere. This layer, which is also part of the upper mantle, extends to a depth of about 200 kilometers.
Rockhound. The lithosphere is composed of the oceanic and continental crust, along with the rigid upper mantle. The asthenosphere is the plastic like upper mantle directly below the lithosphere where rock can move, bend, and deform without breaking.ockhound. The lithosphere is composed of the oceanic and continental crust, along with the rigid upper mantle. The asthenosphere is the plastic like upper mantle directly below the lithosphere where rock can move, bend, and deform without breaking.