Chris leblanc estimates that if he does 5.25 hours of research using data that will cost $ 78.00, there is a good chance that he can improve his expected return on a $ 10 comma 000, 1-year investment from 7.5 % to 10.4 %. chris feels that he must earn at least $ 21.00 per hour on the time he devotes to his research. hris leblanc estimates that if he does 5.25 hours of research using data that will cost $ 78.00, there is a good chance that he can improve his expected return on a $ 10 comma 000, 1-year investment from 7.5 % to 10.4 %. chris feels that he must earn at least $ 21.00 per hour on the time he devotes to his research. a. find the cost of chris's research. b. by how much (in dollars) will chris's return increase as a result of the research? c. on a strict economic basis, should chris perform the proposed research?

5. understanding marginal and average tax rates consider the economy of citronia, where citizens consume only oranges. assume that oranges are priced at $1 each. the government has devised the following tax plans: plan a • consumption up to 1,000 oranges is taxed at 50%. • consumption higher than 1,000 oranges is taxed at 20%. plan b • consumption up to 2,000 oranges is taxed at 15%. • consumption higher than 2,000 oranges is taxed at 60%. use the plan a and plan b tax schemes to complete the following table by deriving the marginal and average tax rates under each tax plan at the consumption levels of 300 oranges, 1,200 oranges, and 3,000 oranges, respectively. consumption level plan a plan b (quantity of oranges) marginal tax rate average tax rate marginal tax rate average tax rate (percent) (percent) (percent) (percent) 300 1,200 3,000 complete the following table by indicating whether each plan is a progressive tax system, a proportional tax system, or a regressive tax system. progressive proportional regressive plan a plan b