Suppose the demand equation is: Q = 80 - 1.25p. What is the price elasticity of demand if the price is $40 per unit and output is 30 units? The price elasticity of demand is . (Enter a numeric response using a real number rounded to two decimal places.)

The Stopdecay Company sells an electric toothbrush for $25. Its sales have averaged 8,000 units per month over the past year. Recently, its closest competitor, Decayfigh ter, reduced the price of its electric toothbrush from $35 to $30. As a result, Stopde cays sales declined by 1,500 units per month. What is the arc cross elasticity of demand between Stopdecays toothbrush and Decayfighters toothbrush? What does this indicate about the relationship between the two products? If Stopdecay knows that the arc price elasticity of demand for its toothbrush is 1.5, what price would Stopdecay have to charge to sell the same number of units as it did before the Decayfighter price cut? Assume that Decayfighter holds the price of its toothbrush constant at $30. What is Stopdecays average monthly total revenue from the sale of electric toothbrushes before and after the price change determined in part (b)? Is the result in part (c) necessarily desirable? What other factors would have to be taken into consideration?

The price elasticity of demand for personal computers is estimated to be 2.2. If the price of personal computers declines by 20 percent, what will be the expected percentage increase in the quantity of computers sold?

Why is the supply curve with constant unitary elasticity a straight line?

What are the major determinants of a products price elasticity of demand? Studies indicate that the demand for Florida oranges, Bayer aspirin, watermelons, and airfares to Europe are elastic. Why?

Suppose Sally buys exactly five bars of English toffee each week, regardless of whether the toffee bars are regularly priced at 1 or on sale for 0.50. Based on this information, what is Sallys price elasticity of demand for English toffee in this price range? a. 0 b. 1 c. Infinity d. Cannot be determined.

Suppose that your demand schedule for pizza is as follows: a. Use the midpoint method to calculate your price elasticity of demand as the price of pizza increases from 8 to 10 if (i) your income is 20,000 and (ii) your income is 24,000. b. Calculate your income elasticity of demand as your income increases from 20,000 to 24,000 if (i) the price is 12 and (ii) the price is 16.

Plot the price and quantity data given in the demand schedule of exercise 1. Put price on the vertical axis and quantity on the horizontal axis. Indicate the price elasticity value at each quantity demanded. Explain why the elasticity value gets smaller as you move down the demand curve.

Explain why using the midpoint formula for calculating the elasticity of demand gives the same result whether price increases or decreases, but using the initial price and quantity instead of the average does not.

Can you think of an industry (or product) with near infinite elasticity of supply in the short term? That is, what is an industry that could increase Qs almost without limit in response to an increase in the price?