In blending problems, if a quality constraint involves a quotient, then the problem will be nonlinear

A real estate salesman went into a neighborhood to obtain listings of residential property. He made representations that because of the entry into the neighborhood of minority groups, property values would be reduced by a decline in the quality of schools and an increase in the crime rate. These practices by the salesman are:

A: Permissible if the representations are true; B: Grounds for disciplinary action; C: Unethical, but beyond the jurisdiction of the Real Estate Commissioner; D: Justified if his activities do not decrease property values for neighboring properties.

An assembly line consists of 21 tasks grouped into 5 workstations. The sum of the 21 task times is 85 minutes. The largest assigned cycle time is 20 minutes. What is the efficiency of this line?

A) 4.2 percent B) 17 percent C) 85 percent D) 100 percent E) 21 percent