EBK MATHEMATICS FOR MACHINE TECHNOLOGY
8th Edition
ISBN: 9781337798396
Author: SMITH
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Chapter 31, Problem 13A
Read the decimal-inch vernier caliper measurements the settings in Exercises 7 through 14
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can you help me solve the parts and show workings please
Suppose that a room containing 1300 cubic feet of air is originally free of carbon monoxide (CO). Beginning
at time t = 0, cigarette smoke containing 4% CO is introduced into the room at a rate of 0.8 cubic feet per
minute. The well-circulated smoke and air mixture is allowed to leave the room at the same rate.
Let A(t) represent the amount of CO in the room (in cubic feet) after t minutes.
(A) Write the DE model for the time rate of change of CO in the room. Also state the initial condition.
dA
dt
A(0)
(B) Solve the IVP to find the amount of CO in the room at any time t > 0.
A(t)
(C) Extended exposure to a CO concentration as low as 0.00012 is harmful to the human body. Find the time
at which this concentration is reached.
t=
minutes
You buy a house for $210000, and take out a 30-year mortgage at 7% interest.
For simplicity, assume that interest compounds continuously.
A) What will be your annual mortgage payment?
$
per year
B) Suppose that regular raises at your job allow you to increase your annual payment by 6% each year. For
simplicity, assume this is a nominal rate, and your payment amount increases continuously. How long will it
take to pay off the mortgage?
years
Chapter 31 Solutions
EBK MATHEMATICS FOR MACHINE TECHNOLOGY
Ch. 31 - Measure this line segment to the nearest 164.Ch. 31 - A hole has a diameter of 13.741 mm 0.002mm+0.005mm...Ch. 31 - For the measurement 74.38 mm, find (a) the degree...Ch. 31 - Express 87.6 inches as feet.Ch. 31 - If 1450 parts can be produced in 15.35 hours, how...Ch. 31 - Prob. 6ACh. 31 - Read the decimal-inch vernier caliper measurements...Ch. 31 - Read the decimal-inch vernier caliper measurements...Ch. 31 - Read the decimal-inch vernier caliper measurements...Ch. 31 - Read the decimal-inch vernier caliper measurements...
Ch. 31 - Read the decimal-inch vernier caliper measurements...Ch. 31 - Prob. 12ACh. 31 - Read the decimal-inch vernier caliper measurements...Ch. 31 - Read the decimal-inch vernier caliper measurements...Ch. 31 - Prob. 15ACh. 31 - The tables for Exercises 15 and 16 give the...Ch. 31 - In Exercises 17 and 18, refer to the following...Ch. 31 - In Exercises 17 and 18, refer to the following...Ch. 31 - The distance between the centers of two holes can...Ch. 31 - The distance between the centers of two holes can...Ch. 31 - Prob. 21ACh. 31 - Prob. 22ACh. 31 - The distance between the centers of two holes can...Ch. 31 - Read height gage measurement settings in Exercises...Ch. 31 - Read height gage measurement settings in Exercises...Ch. 31 - The hole locations of the block in Figure 31-11...
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