Which of the following would be considered a stationary source of air pollution?

Although test marketing costs can be high, they are often small when compared with ________

A) business analysis costs B) the costs of a major mistake C) prototype development costs D) the costs of idea generation E) research and development costs

The first unit took 10 hours and the third unit took 5.68 hours. What is the improvement rate?

A) 70% B) 30% C) 50% D) 90% E) 10%