MyLab Math with Pearson eText -- Standalone Access Card -- for Algebra and Trigonometry with Integrated Review (6th Edition)
6th Edition
ISBN: 9780134753607
Author: Robert F. Blitzer
Publisher: PEARSON
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Chapter 3.7, Problem 30E
The illumination provided by a car's headlight varies inversely as the square of the distance from the headlight. A car's headlight produces an illumination of 3.75 foot-candles at a distance of 40 feet. What is the illumination when the distance is 50 feet?
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- The number of hours it takes for ice to melt varies inversely with the air temperature. Suppose a block of ice melts in 2 hours when the temperature is 65 degrees Celsius. (a) Write the equation of variation. (b) How many hours would it take for the same block of ice to melt if the temperature was 78 degrees?arrow_forwardThe area of the face of a Ferris wheel varies directly with the square of its radius. If the area of one face of a Ferris wheel with diameter 150 feet is 70,650 square feet, what is the area of one face of a Ferris wheel with diameter of 16 feet?arrow_forwardThe distance an object falls is directly proportional to the square of the time it falls. A ball falls 144 feet in 3 seconds. a. Write the equation that relates the distance to the time. b. How far will an object fall in 4 seconds?arrow_forward
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