Calculus: Early Transcendentals
Calculus: Early Transcendentals
8th Edition
ISBN: 9781285741550
Author: James Stewart
Publisher: Cengage Learning
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A pasta company with a blue box produces 1,400 tons of semolina pasta per day. The pasta is fed into a machine as a large,
loose dough and then squeezed through a bronze die to form a desired shape. As the pasta is squeezed through the die,
the volume of space it takes up decreases while the mass remains constant, and thus the resulting shape is more dense. If m is
the constant mass of the pasta in grams and V is the volume of the pasta in mL, then the density p is given by p= -
m
(a) If the mass remains constant while the volume changes with time, find
dp
dt
(b) Suppose the mass of the pasta is 80g, the density is 0.8 g/mL, and the volume is decreasing at a rate of 400 mL/sec.
How fast is the density of the pasta changing at that moment?
mL · sec
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Transcribed Image Text:A pasta company with a blue box produces 1,400 tons of semolina pasta per day. The pasta is fed into a machine as a large, loose dough and then squeezed through a bronze die to form a desired shape. As the pasta is squeezed through the die, the volume of space it takes up decreases while the mass remains constant, and thus the resulting shape is more dense. If m is the constant mass of the pasta in grams and V is the volume of the pasta in mL, then the density p is given by p= - m (a) If the mass remains constant while the volume changes with time, find dp dt (b) Suppose the mass of the pasta is 80g, the density is 0.8 g/mL, and the volume is decreasing at a rate of 400 mL/sec. How fast is the density of the pasta changing at that moment? mL · sec
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