The body mass index (BMI) of a person is defined to be the person’s body mass divided by the square of the person’s height. The article “Influences of Parameter Uncertainties within the ICRP 66 Respiratory Tract Model: Particle Deposition” (W. Bolch, E. Farfan, et al., Health Physics, 2001:378–394) states that body mass index (in kg/m2) in men aged 25–34 is lognormally distributed with parameters μ = 3.215 and σ = 0.157. a.Find the mean and standard deviation BMI for men aged 25–34.  b.Find the standard deviation of BMI for men aged 25–34. c.Find the median BMI for men aged 25–34. d.What proportion of men aged 25–34 have a BMI less than 20? e.Find the 80th percentile of BMI for men aged 25–34.

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Transformation of Graphs

The word ‘transformation’ means modification. Transformation of the graph of a function is a process by which we modify or change the original graph and make a new graph.

Exponential Functions

The exponential function is a type of mathematical function which is used in real-world contexts. It helps to find out the exponential decay model or exponential growth model, in mathematical models. In this topic, we will understand descriptive rules, concepts, structures, graphs, interpreter series, work formulas, and examples of functions involving exponents.