Sally has a decision to make about what she will do in the next 2 years. she can go to school or go straight into the workforce. if sally immediately starts working, she will earn $20,000 in both years 1 and 2. if she goes to school in year 1, she must pay $5,000, but she would earn $47,500 in year 2. if the interest rate is 5%, calculate the present value for sally if she goes to school and if she does not. does the investment in school make sense? does it make sense if the interest rate is 6% or 4%?

You have $22,000 to invest in a stock portfolio. your choices are stock x with an expected return of 11 percent and stock y with an expected return of 13 percent. if your goal is to create a portfolio with an expected return of 11.74 percent, how much money will you invest in stock x? in stock y?

Read the scenario. alfonso is 19 years old and has a high school diploma. recently, he was promoted to assistant manager at the fast-food restaurant where he has worked since the age of sixteen. his dream is to become the restaurant’s manager. what is his best option for achieving his dream? he should find another job and work his way up to a higher position. he should hope that his manager transfers to another location and that he is his replacement. he should attend classes at the local college to receive training in management. he should work hard, work longer hours, and remain assistant manager.

Oz makes lion food out of giraffe and gazelle meat. giraffe meat has 18 grams of protein and 36 grams of fat per pound, while gazelle meat has 36 grams of protein and 18 grams of fat per pound. a batch of lion food must contain at least "46,800" grams of protein and 70,200 grams of fat. giraffe meat costs $1/pound and gazelle meat costs $2/pound. how many pounds of each should go into each batch of lion food in order to minimize costs? hint [see example 2.]