If the demand for a good increases at the same time as the supply of the same good decreases, what will happen to the equilibrium price and quantity of the good?

It is often stated that the Japanese firms develop and adapt new technology to manufacturing process twice as fast as U.S. firms. If this is true, ceteris paribus, we would conclude that the

A) depreciation rate of capital does not change, but the user cost of capital increases. B) depreciation rate of capital increases, but the user cost of capital decreases. C) depreciation rate of capital increases, and the user cost of capital increases. D) U.S. interest rate is too high, preventing American manufacturers from adopting new technologies.

The principle of diminishing marginal utility says that:

A. as more of a good or service is consumed, demand decreases. B. as more of a good or service is consumed, the price will rise. C. the marginal utility of additional units consumed decreases. D. an increase in income causes demand to increase.