1. Body Mass Index (BMI) is a measure of body fat based on height and weight. The 85th percentile BMI for females, ages 9 to 20, increases more slowly than that for males of the same age range. Models that represent the 85th percentile BMI for males and females, ages 9 to 20, are

where B is the BMI (kgm2) and a represents the age, with a = 9 corresponding to 9 years old. Use a graphing utility to determine when the BMI for males exceeds the BMI for females. (Source: Centers for Disease Control and Prevention)
2. You receive two sales job offers. One company offers an annual salary of $55,000 plus a year-end bonus of 1.5% of your total sales. The other company offers an annual salary of $52,000 plus a year-end bonus of 2% of your total sales. How much would you have to sell to make the second job offer better?

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(B = 0.78a + 11.7 [B = 0.68a + 13.5 Males Females