1. When the interest on an investment is compounded continuously, the investment grows at a rate that is proportional to the amount in the account, so that if the amount present is P, then dP =TP, dt where P is in dollars, t is in years, and r is a constant. If $20,000 is invested (when t= 0) and the amount in the account after 22 years is $280,264, find the function that gives the value of the investment as a function of t. What is the interest rate on this investment?

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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1. When the interest on an investment is compounded continuously, the investment grows at a rate that
is proportional to the amount in the account, so that if the amount present is P, then
dP
= rP,
dt
where P is in dollars, t is in years, and r is a constant. If $20,000 is invested (when t= 0) and the
amount in the account after 22 years is $280,264, find the function that gives the value of the
investment as a function of t. What is the interest rate on this investment?
Transcribed Image Text:1. When the interest on an investment is compounded continuously, the investment grows at a rate that is proportional to the amount in the account, so that if the amount present is P, then dP = rP, dt where P is in dollars, t is in years, and r is a constant. If $20,000 is invested (when t= 0) and the amount in the account after 22 years is $280,264, find the function that gives the value of the investment as a function of t. What is the interest rate on this investment?
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