Case Study 3: Improving Body CompositionRick is a healthy 17-year-old high school student who is 70 inches tall and weighs 205 pounds. He has decided to "get a six-pack" over the summer with a diet and exercise program. As part of his new plan, he has stopped drinking soda and is eating more salads in addition to his usual diet. Besides of these changes, he is unclear on how to proceed to reach his fitness goal. Rick’s mother wants to make sure his approach will not interfere with his normal growth and development, and has asked him to seek reliable information to help him make a reasonable plan.1. What is Rick’s BMI? SHOW WORK FOR FULL CREDIT2. What is Rick’s weight category?3. Based on his BMI, in what range is Rick’s body fat likely to be?4. Suppose Rick wanted to reduce his BMI to 27. What would his target weight be? SHOW WORK FOR FULL CREDIT5. What is Rick’s BMR at his current weight? SHOW WORK FOR FULL CREDIT6. Suppose Rick engages in light-to-moderate intensity weight lifting. How many calories will he expend per hour of activity? Use his current weight in your calculations. SHOW WORK FOR FULL CREDIT7. If Rick swims for 30 minutes at a speed of 45 yards per minute, how many calories will he expend? Use his current weight in your calculations. SHOW WORK FOR FULL CREDIT

Our planet has experienced five major extinctions in the four billion year history of life. the first, 450 million years ago, occurred shortly after the evolution of the first land-based plants and 100 million years after the cambrian explosion. the second extinction occurred 350 million years ago, causing the formation of coal forests. next earth experienced two mass extinctions during the triassic period, between 250 and 200 million years ago. the fifth mass extinction occurred 65 million years ago, ending the reptilian dominance of the earth. according to richard leakey, the sixth mass extinction is happening right now. leakey suggests that we, the human race, are the cause. each year, at our hand, approximately 50,000 species vanish from earth. he believes that man is destroying earth at a rate comparable with the impact of a giant asteroid. leakey's statistics indicate that 50% of earth's species will become extinct within the next 100 years assuming leakey's hypothesis of a sixth mass extinction to be true, how will we expect the model to change? a) a sharp spike in the graph approximately 100 million years from now b) a dip in the graph, followed by a sharp spike about 100 million years from now c) a sharp spike in the graph immediately following the "0" location of the x axis d) a plateau following the "0" mark on the x axis, followed by a gradual rise to a new peak