The mass of a length of wire is m(r) = x(1+2√7) kilograms, where r is the length of the wire measured in meters. The linear density of the wire is the rate of change of the mass m with respect to z. Find the linear density of the wire (expressed in kg/m) when z = 4 m. (A) 1 (B) 4 (C) 7 (D) 10

Calculus: Early Transcendentals
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Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
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Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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The mass of a length of wire is m(x) = x(1+2√7) kilograms, where r is the length of the wire
measured in meters. The linear density of the wire is the rate of change of the mass m with respect
to x. Find the linear density of the wire (expressed in kg/m) when x = 4 m.
(A) 1
(B) 4
(C) 7
(D) 10
Transcribed Image Text:The mass of a length of wire is m(x) = x(1+2√7) kilograms, where r is the length of the wire measured in meters. The linear density of the wire is the rate of change of the mass m with respect to x. Find the linear density of the wire (expressed in kg/m) when x = 4 m. (A) 1 (B) 4 (C) 7 (D) 10
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