Which situation best illustrates an example of an opportunity cost?

Five times the sum of a number and 27 is greater then or equal to six times the of that number and 26. what is the solution set to this proportion?

Using a cps-sample of 7,440 individuals, you estimate the following regression: = 20.91 - 2.61 x female where female is a binary variable that takes on the value of 1 for females and is 0 otherwise. the standard error on the coefficient on female is 0.25. the 95% confidence interval for the gender wage gap, or the amount that females earn less, is: a) [-3.10, -2.12] b) [18.30, 23.52] c) [-3.02, -2.20] d) [-1.96, -1.64]

When the price is the equilibrium price, we would expect there to be a causing the market to put pressure on the price until it went back to the equilibrium price. a. above; surplus; upward b. above; shortage; downward c. below; surplus; upward d. below; shortage; downward e. above; surplus; downward?