Concept explainers
Use the following information to answer the questions in Exercises 62–67. To quantify the intensity of sound, the decibel scale (named for Alexander Graham Bell) was developed. The formula for loudness L on the decibel scale is
67. Decibel Scale If the decibel reading of a sound that is painful is 140 and the decibel reading of rock music is 120, how much more intense is the painful sound than the rock music?
Want to see the full answer?
Check out a sample textbook solutionChapter 5 Solutions
College Algebra in Context with Applications for the Managerial, Life, and Social Sciences (5th Edition)
- In Exercises 139–142, determine whether each statement is true or false. If the statement is false, make the necessary change(s) to produce a true statement. log, 8 8 140. log(-100) = -2 139. log, 4 141. The domain of f(x) = log, x is (-0∞, ∞). 4 142. log, x is the exponent to which b must be raised to obtain x.arrow_forwardWhat is the photon frequency (Terahertz = 1012 Hz) needed to move an electron in a hydrogen atom from a lower energy level n; = 2 to a higher energy level nf = 7? (keep 3 decimal places) %3Darrow_forward7. Evaluate log, V27. 6.47912Y2arrow_forward
- 3. Fill in the missing values a. log3 4 + log3 7 = log3 %3D b. log2 4 – log2 11 = log2 c. log4 - 3log4 %3D 125arrow_forwardSuppose log, 3 = 15 and log, 5 = 22, find: %3D %3D a) log. 9 b) log, 75arrow_forwarda. Evaluate log, 7 b. Evaluate 6• log, 7 c. How do the values of the expressions in parts (a) and (b) compare?arrow_forward
- Exercise 4. Log(1 – iV3)² = a. 2Log(1 – iV3) b. Log(1+ iv3) c. 2Log(1 + iv3) d. None of thesearrow_forward3. log 12 ? A. log 3 log 4 B. 4 log 3 C. log 3 + 2 log 2 D. 3 log 4arrow_forward3. Use log, 2 0.4307 and log, 3 0.6826to approximate the value of log, 54. A. 0.8820 B. 2.4785 O C. 0.1370 O D. 0.7488arrow_forward
- Algebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage