Investment and saving decisions are assumed by economists to depend on the ________ interest rate

Mark owns a ranch in Colorado that costs $3.76 million per year to operate. Of that, his explicit cost equals $3.29 million. Therefore his actual monetary cost of running the ranch is:

a. $3.29 million. b. over $7 million. c. $470,000. d. $3.76 million.

For a single-price monopoly, marginal revenue is ________ when demand is elastic and is ________ when demand is inelastic

A) negative; negative B) negative; positive C) positive; negative D) positive; positive