The following exercise poses a question that can be answered by solving an equation. Give the appropriate equation. Note that you are not asked to solve the equation. An investment grows according to the formula B = 400e0.05t dollars, where t is time, measured in years. The time required for the balance to reach $2400 is the solution of an equation. Find that equation. 400e0.05t Need Help? X Read It

The following exercise poses a question that can be answered by solving an equation. Give the appropriate equation. Note that you are not asked to solve the equation. An investment grows according to the formula B = 400e0.05t dollars, where t is time, measured in years. The time required for the balance to reach $2400 is the solution of an equation. Find that equation. 400e0.05t Need Help? X Read It

Algebra: Structure And Method, Book 1

(REV)00th Edition

ISBN:9780395977224

Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Publisher:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. Cole

Chapter3: Solving Equation And Problems

Section3.2: Transforming Equations: Multiplication And Division

Problem 17P

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Sarah wants to arrive at her friend’s wedding at 3:00. The distance from Sarah’s house to the wedding is 95 miles. Based on usual traffic patterns, Sarah predicts she can drive the first 15 miles at 60 miles per hour, the next 10 miles at 30 miles per hour, and the remainder of the drive at 70 miles per hour. (a) How long will it take Sarah to drive the first 15 miles? (b) How long will it take Sarah to drive the next 10 miles? (c) How long will it take Sarah to drive the rest of the trip? (d) What time should Sarah leave her house?
Without solving the problem “What is 20% of 300?” think about what the solution might be. Should it be a number that is greater than 300 or less than 300? Explain your reasoning.
For exercises 17 and 18, use this scenario: A retired woman has $50,000 to invest but needs to make $6,000 a yearfrom the interest to meet certain living expenses. One bond investment pays 15% annual interest. The rest of it shewants to put in a CD that pays 7%. 18. Set up and solve the equation for how much the woman should invest in each option to sustain a $6,000 annual return.
Solve 2x=100.