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.
The crust is part of the lithosphere. The lithosphere is composed of the crust plus the brittle uppermost layer of the mantle. Together, they form the tectonic plates which f â¦ loat on top of the plastic-like rock of the mantle called the asthenosphere.he asthenosphere is that part of the Earth which is viscous and undergoes ductile deformation and convection on a geological time scale. It is part of the upper mantle and is approximately 600 km thick laying below the lithosphere at a depth of around 100 to 200 km and it's base is around 700 km deep.