In a simple economy in which prices are constant and with no income taxes or imports, the marginal propensity to consume is 0.8. if investment increases by $50, what impact will that have on aggregate expenditure?
a) decrease by $100b) increase by $250c) increase by $100d) decrease by $250

Describe three scenarios in which you might utilize mathematics to investigate a crime scene, accident scene, or to make decisions involving police practice. be sure to explain how math is used in police as they work through each scenario.

The year is 2278, and the starship enterprise is running low on dilithium crystals, which are used to regulate the matter-antimatter reactions that propel the ship across the universe. without the crystals, space-time travel is not possible. if there is only one known source of dilithium crystals, the necessary conditions for a monopoly are met. part 2 (1 point)see hint if the crystals are government owned or government regulated, and the government wants to create the greatest welfare for society, then it should set the price choose one or more: a. so only the rich can afford space-time travel. b. at the profit-maximizing price. c. at the efficient price. d. using the marginal-cost pricing rule. e. so everyone can afford space-time travel. f. at the monopoly price.

When the benefit of one particular use of a resource is greater than the opportunity cost, then that resource is which of the following? a. not scarce b. being used efficiently c. a normal good d. non-excludable