The surface temperature of a deep, spring-fed lake is 70°F. The lake temperature drops 2°F for each yard below the lake surface until a depth of 6 yards is reached. From 6 yards to 15 yards deep, the temperature is constant. From 15 yards down to the spring source, the temperature increases 3°F per foot until the spring source is reached at 20 yards below the surface. a. What is the temperature at 10 yards below the surface? b. What is the temperature at 50 feet below the surface? c. Write an expression for finding the lake temperature at the spring source.

The surface temperature of a deep, spring-fed lake is 70°F. The lake temperature drops 2°F for each yard below the lake surface until a depth of 6 yards is reached. From 6 yards to 15 yards deep, the temperature is constant. From 15 yards down to the spring source, the temperature increases 3°F per foot until the spring source is reached at 20 yards below the surface. a. What is the temperature at 10 yards below the surface? b. What is the temperature at 50 feet below the surface? c. Write an expression for finding the lake temperature at the spring source.

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter12: Quadratic Functions

Section12.8: Joint And Combined Variation

Problem 11P

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