The restriction x11,x12, x21, x22 ≥ 0 in the model means: a. Each decision variable must be positive in the optimal solution.
b. Each decision variable must be nonnegative in the optimal solution.
c. x11+ x12 + x21 + x22 ≥ 0
d. All of the above
e. None of the above

Wanda has graduated from community university (cu) and after nine months has failed to find a job. she graduated with a degree in business, and her college was aacsb accredited. (aacsb accreditation is a specialized accreditation for business schools that evidences a quality program.) in her complaint, she alleges that four years of school and tuition should guarantee a job in the field of study and states that she wants her money back. at no time did cu guarantee job placement, either through express or implied statements. wanda does not disagree with this but still thinks that she was wronged and that it is unfair to graduate and not get a job automatically. cu will be successful in extinguishing wanda's lawsuit if its attorney files a

The systems analysis phase includes three activities – requirements modeling, data and process modeling, and consideration of development strategies. choose two of these activities, explain their differences, and discuss how they are used to accomplish the main objective which is to understand the proposed project.

Recently, verizon wireless ran a pricing trial in order to estimate the elasticity of demand for its services. the manager selected three states that were representative of its entire service area and increased prices by 5 percent to customers in those areas. one week later, the number of customers enrolled in verizon's cellular plans declined 4 percent in those states, while enrollments in states where prices were not increased remained flat. the manager used this information to estimate the own-price elasticity of demand and, based on her findings, immediately increased prices in all market areas by 5 percent in an attempt to boost the company's 2016 annual revenues. one year later, the manager was perplexed because verizon's 2016 annual revenues were 10 percent lower than those in 2015"the price increase apparently led to a reduction in the company's revenues. did the manager make an error? yes - the one-week measures show demand is inelastic, so a price increase will decrease revenues. yes - the one-week measures show demand is elastic, so a price increase will reduce revenues. yes - cell phone elasticity is likely much larger in the long-run than the short-run. no - the cell phone market must have changed between 2011 and 2012 for this price increase to lower revenues.