Taxpayers who make a combined business and pleasure trip:
a. Can take a tax deduction only for the personal part of the trip.
b. Must allocate the travel cost between the business and pleasure parts of the trip if the travel is outside the United States.
c. Must allocate the travel cost between the business and pleasure parts of the trip if the travel is within the United States.
d. Can deduct the cost of meals, lodging, local transportation, and incidental expenses in full.

Feedback systems do not always involve negative feedback. economic inflation, which is evidenced by continually rising prices, is a positive feedback system. a positive feedback control system, as shown on the right, adds the feedback signal to the input signal, and the resulting signal is used as the input to the process. a simple model of the price-wage inflationary spiral is shown on the right. add additional feedback loops, such as legislative control or control of the tax rate, to stabilize the system. it is assumed that an increase in workers’ salaries, after some time delay, results an increase in prices. under what conditions could prices be stabilized by falsifying or delaying the availability of cost-ofliving data? how would a national wage and price economic guideline program affect the feedback system?