How to find the area of a trapezoid

According to the law of demand, there is an inverse relationship between price and quantity demanded. that is, the demand curve for goods and services slopes downward. why?

Gdonald was unhappy that his company did not provide good transport facilities. he found it very strenuous to drive to work on his own, and this eventually led to job dissatisfaction. hence, he recommended ways to solve this problem. according to the evln model, this information suggests that donald's main reaction to job dissatisfaction was:

There are three factors that can affect the shape of the treasury yield curve (r* t , ip t , and mrp t ) and five factors that can affect the shape of the corporate yield curve (r* t , ip t , mrp t , drp t , and lp t ). the yield curve reflects the aggregation of the impacts from these factors. suppose the real risk-free rate and inflation rate are expected to remain at their current levels throughout the foreseeable future. consider all factors that affect the yield curve. then identify which of the following shapes that the us treasury yield curve can take. check all that apply.a. downward-sloping yield curveb. upward-sloping yield curvec. inverted yield curve