Felix Mining acquired a copper mine at a total cost of $3,000,000. The mine is expected to produce 6,000,000 tons of copper over its five-year useful life and have no residual value. During the first year of operations, 750,000 tons of copper was extracted. Depletion for the first year should be:

Jenny​ walters, who owns a real estate​ agency, bought an old house to use as her business office. she found that the ceiling was poorly insulated and that the heat loss could be cut significantly if six inches of foam insulation were installed. she estimated that with the​ insulation, she could cut the heating bill by​ $80 per month and the​ air-conditioning cost by​ $70 per month. assuming that the summer season is three months​ (june, july, and​ august) of the year and that the winter season is another three months​ (december, january, and​ february) of the​ year, how much can jenny spend on insulation if she expects to keep the property for five​ years? assume that neither heating nor​ air-conditioning would be required during the fall and spring seasons. if she decides to install the​ insulation, it will be done at the beginning of may.​ jenny's interest rate is​ 6% compounded monthly.

Sarah, a self-employed blogger, has adjusted gross earnings of $45,162 this year. find the amount of social security and medicare taxes paid by sarah.

If the price of walnuts rises, many people would switch from consuming walnuts to consuming pecans. but if the price of salt rises, people would have difficulty purchasing something to use in its place. these examples illustrate the importance of