Concept explainers
Use the four-step procedure for solving variation problems given on page 445 to solve Exercises 21–36.
31. Body-mass index, or BMI, takes both weight and height into account when assessing whether an individual is underweight or overweight. BMI varies directly as one’s weight, in pounds, and inversely as the square of one’s height, in inches. In adults, normal values for the BMI are between 20 and 25, inclusive. Values below 20 indicate that an individual is underweight and values above 30 indicate that an individual is obese. A person who weighs 180 pounds and is 5 feet, or 60 inches, tall has a BMI of 35.15. What is the BMI, to the nearest tenth, for a 170-pound person who is 5 feet 10 inches tall? Is this person overweight?
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Chapter 3 Solutions
College Algebra Essentials (5th Edition)
- (a) find the value of A and a, correct to 3 decimal places,(b) predict the percentage of mathematicians after 15 years, and(c) predict the percentage of mathematicians attending the conference inthe long run.arrow_forward1) A basic law of physics states that, when an object is dropped in a near-vacuum, the distance it falls varies directly with the square of the elapsed time. If an object dropped in a near-vacuum falls 64 feet in 2 seconds, how far does it fall in 3 seconds? (Assume that the object does not hit the ground before 3 seconds have elapsed).arrow_forwardThe number of days a barrel of water lasts varies inversely with the people who consume it. If a barrel of water lasts four days for five people, how long will it last if the consumer will be ten people? 1. As you have observed on your solution, what happen to the number of days a barrel of water could last as the number of persons increases from 5 up to 10 people? 2. Dealing with the same problem, crrate your ow questio regarding the number of days the barrel could last if there is a certain number of consumers. Also show your solution to your problem.arrow_forward
- The critical value of chi-square is what when degrees of freedom equal 9 and a equals .05?arrow_forwardGiven that height of the water in a tank is increasing at a constant rate of 3.7 cm/min, use the rate of change to determine the missing values in the table. Time (in min) Height of water (in cm 2.8 3.9 23.03 5.5 43.01arrow_forwardDetermine the best (according to sum-of-squares-measure) curve y = Aebx , through the data above. Transformed equation ln(y) = ln(A) + bx or Y = a + bx.arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:CengageMathematics For Machine TechnologyAdvanced MathISBN:9781337798310Author:Peterson, John.Publisher:Cengage Learning,