PRECALULAS DDA
6th Edition
ISBN: 9780134752914
Author: Blitzer
Publisher: PEARSON CLINICAL ASSESSMENTS
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Chapter 2.8, Problem 54PE
To determine
To calculate: The illumination from lamp’s light when distance of lamp increases from15 inches to 30 inches over the desk.
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- The distance an object falls varies directly to the square of the time it falls. If an object falls 52.8 feet in 4 seconds, how far will it fall in 9 seconds?arrow_forwardThe volume of a gas in a container varies inversely as the pressure on the gas. If a container of argon has a volume of 336 cubic inches under a pressure of 2,500 psi, what will be its volume if the pressure is decreased to 2,000 psi?arrow_forwardThe force needed to break a board varies inversely with its length. If Tom uses 20 pounds of pressure to break a 1 .5-foot long board, how many pounds of pressure would he need to use to break a 6 foot long board?arrow_forward
- The 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 surface area of a cube varies directly as the square of the length of an edge. If the surface area of a cube that has edges 8 inches long is 384 square inches, find the square area of a cube that has edges 10 inches long.arrow_forwardThe 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. 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_forward
- 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 number of hours it takes for ice to melt varies inversely with the air temperature. A block of ice melts in 2.5 hours when the temperature is 54 degrees. How long would it take for the same block of Ice to melt if the temperature was 45 degrees?arrow_forward
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