The loudness of a sound of intensity x, measured in watts per square meter, is defined as L(x) = log (
), where xo = 10-3.A company with loud machinery needs to cut its sound intensity to 26% of its original level. By how many decibels should the loudness be reduced?
A. 6.880 decibels
B. 5.760 decibels
C. 6.237 decibels
D. 5.850 decibels
Answer: D
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Choose the first set in the list natural numbers, whole numbers, integers, rational numbers, and real numbers that describes the following number.-33.2
A. Real numbers B. Natural numbers C. Rational numbers D. Integers
Use the following definitions to determine if the statement is true or false. N = {x : x is a natural number}I = {x : x is an integer}R = {x : x is a real number}W = {x : x is a whole number}Q = {x : x is a rational number}I is a proper subset of N, W, Q, and R.
A. True B. False
Use differentials to estimate the amount of paint needed to apply a coat of paint 0.0017 cm thick to a hemispherical dome with diameter 70 m.
Select the correct answer. a. 4.165? b. 2.52? c. 4.11? d. 3.82? e. 2.28?
Solve the problem.From a point on a straight road, John and Fred ride bicycles in opposite directions. John rides 6 miles per hour and Fred rides 10 miles per hour. In how many hours will they be 64 miles apart?
A. 3 hours B. Not enough information C. 4 hours D. 5 hours