Increases in longevity may contribute to the greater productivity of older creative individuals by allowing them more:

Pete feeds his dog 100 percent more Pup-Peronis when Zuke's treats increase in price by 50 percent. For Pete, Pup-Peronis and Zuke's are ________ and the cross-price elasticity of demand is ________

A) complements; -1/2 B) substitutes; 2 C) substitutes; -2 D) complements; 2 E) substitutes; 1/2

If Katie purchases two slices of pizza and six breadsticks to maximize her total utility, then

A) a slice of pizza costs three times as much as a breadstick. B) a breadstick costs three times as much as a slice of pizza. C) her marginal utility from the second slice of pizza divided by the price of a slice of pizza is equal to her marginal utility from the sixth breadstick divided by the price of a breadstick. D) Both answers A and C are correct.