7. All of the following problems involve interest that is being compounded continuously. (a) Compute the interest rate needed to double an investment every seven years. (b) With a 10% interest, how long will it take to triple an initial investment. (c) Irvin forgot what is the interest rate at his bank. All he knows is that after five years, his initial investment doubled. When will it triple? (Hint: There are two unknowns; one is the interest rate. Whenever there are two unknowns, two equations are needed. So, use the information about money at different times in an appropriate manner.)

7. All of the following problems involve interest that is being compounded continuously. (a) Compute the interest rate needed to double an investment every seven years. (b) With a 10% interest, how long will it take to triple an initial investment. (c) Irvin forgot what is the interest rate at his bank. All he knows is that after five years, his initial investment doubled. When will it triple? (Hint: There are two unknowns; one is the interest rate. Whenever there are two unknowns, two equations are needed. So, use the information about money at different times in an appropriate manner.)

Principles of Economics 2e

2nd Edition

ISBN:9781947172364

Author:Steven A. Greenlaw; David Shapiro

Publisher:Steven A. Greenlaw; David Shapiro

Chapter17: Financial Markets

Section: Chapter Questions

Problem 5SCQ: Investors sometimes fear that a high-risk investment is especially likely to have low returns. Is...

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