World population. If the world population is now 7.4 billion people and if it continues to grow at an annual rate of 1.1 % compounded continuously, how long (to the nearest year) would it take before there is only 1 square yard of land per person? (The Earth contains approximately 1.68 × 10 14 square yards of land.)
World population. If the world population is now 7.4 billion people and if it continues to grow at an annual rate of 1.1 % compounded continuously, how long (to the nearest year) would it take before there is only 1 square yard of land per person? (The Earth contains approximately 1.68 × 10 14 square yards of land.)
Solution Summary: The author calculates the time to the nearest year when there is only 1 square yard of land per person remaining.
World population. If the world population is now
7.4
billion people and if it continues to grow at an annual rate of
1.1
%
compounded continuously, how long (to the nearest year) would it take before there is only
1
square yard of land per person? (The Earth contains approximately
1.68
×
10
14
square yards of land.)
EXAMPLE 3
Find
S
X
√√2-2x2
dx.
SOLUTION Let u = 2 - 2x². Then du =
Χ
dx =
2- 2x²
=
信
du
dx, so x dx =
du and
u-1/2 du
(2√u) + C
+ C (in terms of x).
Let g(z) =
z-i
z+i'
(a) Evaluate g(i) and g(1).
(b) Evaluate the limits
lim g(z), and lim g(z).
2-12
(c) Find the image of the real axis under g.
(d) Find the image of the upper half plane {z: Iz > 0} under the function g.
k
(i) Evaluate
k=7
k=0
[Hint: geometric series + De Moivre]
(ii) Find an upper bound for the expression
1
+2x+2
where z lies on the circle || z|| = R with R > 10. [Hint: Use Cauchy-Schwarz]
Chapter 2 Solutions
Pearson eText for Finite Mathematics for Business, Economics, Life Sciences, and Social Sciences -- Instant Access (Pearson+)
Elementary Statistics: Picturing the World (7th Edition)
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