Depends on the equation your doing , but most likely you would multiply or divide the lengths.
The perimeter is about 82 yards
first, the perimeter of the rectangles is 30*2 = 60 (the 7 is not a part of the overall perimeter so we do not need to add it)
the "perimeter" (circumference) of the 2 semi circles = (22/7)*7 = 22by using the formula C = pi*d (2 semi circles of the same diamter = 1 circle)
now just add the 2 answers
22 + 60
= 82 yards
Calvin may claim 2018 depreciation in the amount of $339.
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Solution:
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The following are the given details,
- Cost of the new desk = $2373
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The recovery period of the new office desk is 7 years.
We have to find the amount that has to be claimed on 2018 depreciation
We know, the rate of MACRS(Modified Accelerated Cost Recovery System) depreciation is 14.29% (Using the half-year convention)

Half-year convention is used to evaluate depreciation for tax purposes and denotes that the fixed assests will be considered to be in service for one-half of its first year, irrespective of actual purchase date.
The half-year convention in tax accounting, is generally used for federal income tax purposes. It influences the depreciation deduction computation in the fiscal year in which the property like machinery, plant, etc was placed into the service.
Since we know that a square has all equal sides, we can simply divide the perimeter by 4 to get each side length.

Using the information above, we can see that each side is
3x+13 units.