fraction of the 620 seniors that chose a specifi c area of study. Use this information for Exercises 89–96. 1 4 1 10 Science Liberal arts 2 5 1 5 Psychology Business 1 20 Math 89) What fraction of seniors chose math or science as an area of study? 90) What fraction of seniors chose psychology or liberal arts as an area of study? 91) How many seniors chose math or science as an area of study? 92) How many seniors chose psychology or liberal arts as an area of study? 93) What fraction of seniors did not choose business as an area of study? 94) How many seniors did not choose business as an area of study? 95) Which two areas of study together equal the choice of exactly one-half the senior class? 96) Verify that the fi ve fractional parts have a sum of 1. 87) Fiona drives an electric-powered car. When she sets off for work, the battery has 5 6 of its capacity remaining before it begins using its gas generator. When she arrives at work, 3 10 of the battery’s electric capacity remains. What fraction of the battery’s electric capacity was used on Fiona’s drive to work? 88) At the beginning of Lionel’s school day, his laptop computer indicated that his battery was charged to 7 capacity. At the end of the day, the battery was 8 charged to 1 3 capacity. What fraction of the laptop’s battery capacity was used during the day? A group of 620 college-bound seniors at Chavez High School was asked to indicate which of the fi ve areas shown they might like to study. The pie chart shows the R1) Were there any problems you could not do? If so, circle them or write them on your paper, and ask someone for help. R2) Create a word problem similar to those in Objective 5 from an experience you have had in the past month; then, solve it. 256 CHAPTER 4 Adding and Subtracting Fractions www.mhhe.com/messersmith
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