Which of the following is an example of a positive externality? Group of answer choices permitting smoking on commercial airplanes raising the speed limit to 60 mph in school zones planting trees along a sidewalk which add beauty and create shade a police department stops enforcing DUI laws

The correct answer is letter "C": planting trees along a sidewalk which add beauty and create shade.

Explanation:

Externalities are the effects of the actions of individuals or organizations that influence others without those others having to be involved in the individuals' or entities' activities. Externalities are positive if they benefit others or negative when they affect other individuals.

Thus, planting trees along a sidewalk which adds beauty and creates shade is a positive externality because others benefit from the planting not necessarily being involved in purchasing, planting, or watering the trees.

answer; a large down payment,a longer term loan, would result in a lower monthly payment;

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.