Chapter 4: Problem 3
How much would you need to deposit in a bank account paying \(4 \%\) annual interest compounded continuously so that at the end of 10 years you would have \(\$ 10,000 ?\)
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Chapter 4: Problem 3
How much would you need to deposit in a bank account paying \(4 \%\) annual interest compounded continuously so that at the end of 10 years you would have \(\$ 10,000 ?\)
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The functions cosh and \(\sinh\) are defined by $$ \cosh x=\frac{e^{x}+e^{-x}}{2} \text { and } \sinh x=\frac{e^{x}-e^{-x}}{2} $$ for every real number \(x .\) For reasons that do not concern us here, these functions are called the hyperbolic cosine and hyperbolic sine; they are useful in engineering. Show that $$ (\cosh x+\sinh x)^{t}=\cosh (t x)+\sinh (t x) $$ for all real numbers \(x\) and \(t\).
Suppose one bank account pays \(3 \%\) annual interest compounded once per year, and a second bank account pays \(4 \%\) annual interest compounded continuously. If both bank accounts start with the same initial amount, how long will it take for the second bank account to contain \(50 \%\) more than the first bank account?
Estimate the value of $$ \left(1+\frac{3}{10^{100}}\right)^{\left(10^{100}\right)} $$. [Your calculator will be unable to evaluate directly the expressions in this exercise and the next five exercises. Thus you will need to do more than button pushing for these exercises.]
(a) Show that
$$
1.01^{100}
Suppose the amount of the world's computer hard disk storage increases by a total of \(200 \%\) over a four-year period. What is the continuous growth rate for the amount of the world's hard disk storage?
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