WebAssign Printed Access Card for Larson's Calculus: An Applied Approach, 10th Edition, Single-Term
10th Edition
ISBN: 9781337652308
Author: Ron Larson
Publisher: Brooks Cole
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Chapter A1, Problem 31E
To determine
To calculate: The range of the target heart rate for physical activity for 20 years old if the maximum heart rate in beats per minute of a person of normal health is
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Physicists using the radioactivity equation y = yo e
- kt
call the number
1
the mean life of a radioactive nucleus. Show that 95% of the
radioactive nuclei originally present in a sample will disintegrate within three mean lifetimes, i.e., by time t=.
Thus, the mean life of a
k
nucleus gives a quick way to estimate how long the radioactivity of a sample will last.
.....
- kt
If 95% of a sample has decayed, there is 5% remaining. How can you use the radioactivity equation y(t) = yo e
to find when 5% of the
sample is remaining?
A. Set y(t) equal to 0.05 and solve for t.
B. Evaluate y(0.05).
C. Set y(t) equal to 0.05y, and solve for t.
D. Evaluate y(5).
Perform the operation determined in the previous step.
Yo e
- kt
0.05yo
- kt
e
= 0.05
Divide both sides by yo:
= In 0.05
Take the natural logarithm of each side.
In 0.05
t =
Solve for t.
Approximate In 0.05.
In 0.05 x (Round to three decimal places as needed.)
Since this value is approximately equal to
then 95% of a sample will…
Data comprises of the number of hours studied (x) and the exam grade (y) obtained for first 6 year students registered. The equation of best fit is given by: y= 67.071 + 4.535x.
What is the correct interpretation of the equation?
The population density of the State A has been steadily increasing since 2000. The population density of the State A can be estimated using the equation P=0.82x+76.5, where P is the population density, measured in people per square mile, and x is the number of years since 2000. Use x=1 for 2001, x=2 for 2002, and so on. If the population density continues to increase at its current rate,
a. Determine the population density of the State A in 2009
b. During what year will the population density of the State A reach 110 people per square mile?
Chapter A1 Solutions
WebAssign Printed Access Card for Larson's Calculus: An Applied Approach, 10th Edition, Single-Term
Ch. A1 - Prob. 1CPCh. A1 - Prob. 2CPCh. A1 - Checkpoint 3 Worked-out solution available at...Ch. A1 - Prob. 1ECh. A1 - Prob. 2ECh. A1 - Prob. 3ECh. A1 - Prob. 4ECh. A1 - Prob. 5ECh. A1 - Prob. 6ECh. A1 - Prob. 7E
Ch. A1 - Prob. 8ECh. A1 - Prob. 9ECh. A1 - Prob. 10ECh. A1 - Prob. 11ECh. A1 - Prob. 12ECh. A1 - Prob. 13ECh. A1 - Prob. 14ECh. A1 - Prob. 15ECh. A1 - Prob. 16ECh. A1 - Prob. 17ECh. A1 - Prob. 18ECh. A1 - Prob. 19ECh. A1 - Prob. 20ECh. A1 - Prob. 21ECh. A1 - Prob. 22ECh. A1 - Prob. 23ECh. A1 - Prob. 24ECh. A1 - Prob. 25ECh. A1 - Prob. 26ECh. A1 - Prob. 27ECh. A1 - Prob. 28ECh. A1 - Prob. 29ECh. A1 - Writing Inequalities In Exercises 27-30, use...Ch. A1 - Prob. 31ECh. A1 - Prob. 32ECh. A1 - Profit The revenue for selling x units of a...Ch. A1 - Sales A doughnut shop sells a dozen doughnuts for...Ch. A1 - Prob. 35ECh. A1 - Prob. 36E
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