Potential entrants are more likely to be deterred from actually entering an industry when: A. incumbent firms are willing and able to be aggressive in defending their market positions against entry. B. incumbent firms are complacent. C. buyers are not particularly price-sensitive and the industry already contains a dozen or more rivals. D. the relative cost positions of incumbent firms are about the same, such that no one incumbent has a meaningful cost advantage. E. buyer switching costs are moderately low because of strong product differentiation among incumbent firms. The threat of new entry increases the competitive pressures in an industry. This is because incumbent firms typically lower prices and increase defensive actions in an attempt to deter new entry when the threat of entry is high.

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.