# 6.4 Solve simple interest applications  (Page 2/8)

 Page 4 / 8

Find the principal invested if $\text{15,222.57}$ interest was earned in $6$ years at an interest rate of $\text{10.28%}.$

$24,679.91 Find the principal invested if $\text{10,953.70}$ interest was earned in $5$ years at an interest rate of $\text{11.04%.}$ Find the rate if a principal of $\text{5,400}$ earned $\text{432}$ interest in $2$ years. 4% Find the rate if a principal of $\text{2,600}$ earned $\text{468}$ interest in $6$ years. Find the rate if a principal of $\text{11,000}$ earned $\text{1,815}$ interest in $3$ years. 5.5% Find the rate if a principal of $\text{8,500}$ earned $\text{3,230}$ interest in $4$ years. Solve Simple Interest Applications In the following exercises, solve the problem using the simple interest formula. Casey deposited $\text{1,450}$ in a bank account with interest rate $\text{4%.}$ How much interest was earned in $2$ years?$116

Terrence deposited $\text{5,720}$ in a bank account with interest rate $\text{6%.}$ How much interest was earned in $4$ years?

Robin deposited $\text{31,000}$ in a bank account with interest rate $\text{5.2%}.$ How much interest was earned in $3$ years?

$4,836 Carleen deposited $\text{16,400}$ in a bank account with interest rate $\text{3.9%}.$ How much interest was earned in $8$ years? Hilaria borrowed $\text{8,000}$ from her grandfather to pay for college. Five years later, she paid him back the $\text{8,000},$ plus $\text{1,200}$ interest. What was the rate of interest? 3% Kenneth lent his niece $\text{1,200}$ to buy a computer. Two years later, she paid him back the $\text{1,200},$ plus $\text{96}$ interest. What was the rate of interest? Lebron lent his daughter $\text{20,000}$ to help her buy a condominium. When she sold the condominium four years later, she paid him the $\text{20,000},$ plus $\text{3,000}$ interest. What was the rate of interest? 3.75% Pablo borrowed $\text{50,000}$ to start a business. Three years later, he repaid the $\text{50,000},$ plus $\text{9,375}$ interest. What was the rate of interest? In $10$ years, a bank account that paid $\text{5.25%}$ earned $\text{18,375}$ interest. What was the principal of the account?$35,000

In $25$ years, a bond that paid $\text{4.75%}$ earned $\text{2,375}$ interest. What was the principal of the bond?

Joshua's computer loan statement said he would pay $\text{1,244.34}$ in interest for a $3$ year loan at $\text{12.4%}.$ How much did Joshua borrow to buy the computer?

$3,345 Margaret's car loan statement said she would pay $\text{7,683.20}$ in interest for a $5$ year loan at $\text{9.8%.}$ How much did Margaret borrow to buy the car? Caitlin invested $\text{8,200}$ in an $\text{18-month}$ certificate of deposit paying $\text{2.7%}$ interest. How much interest did she earn form this investment?$332.10

Diego invested $\text{6,100}$ in a $\text{9-month}$ certificate of deposit paying $\text{1.8%}$ interest. How much interest did he earn form this investment?

Airin borrowed $\text{3,900}$ from her parents for the down payment on a car and promised to pay them back in $15$ months at a $\text{4%}$ rate of interest. How much interest did she owe her parents?

$195.00 Yuta borrowed $\text{840}$ from his brother to pay for his textbooks and promised to pay him back in $5$ months at a $\text{6%}$ rate of interest. How much interest did Yuta owe his brother? ## Everyday math Interest on savings Find the interest rate your local bank pays on savings accounts. 1. What is the interest rate? 2. Calculate the amount of interest you would earn on a principal of $\text{8,000}$ for $5$ years. Answers will vary. Interest on a loan Find the interest rate your local bank charges for a car loan. 1. What is the interest rate? 2. Calculate the amount of interest you would pay on a loan of $\text{8,000}$ for $5$ years. ## Writing exercises Why do banks pay interest on money deposited in savings accounts? Answers will vary. Why do banks charge interest for lending money? ## Self check After completing the exercises, use this checklist to evaluate your mastery of the objectives of this section. On a scale of 1–10, how would you rate your mastery of this section in light of your responses on the checklist? How can you improve this? #### Questions & Answers Is there any normative that regulates the use of silver nanoparticles? Damian Reply what king of growth are you checking .? Renato What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ? Stoney Reply why we need to study biomolecules, molecular biology in nanotechnology? Adin Reply ? Kyle yes I'm doing my masters in nanotechnology, we are being studying all these domains as well.. Adin why? Adin what school? Kyle biomolecules are e building blocks of every organics and inorganic materials. Joe anyone know any internet site where one can find nanotechnology papers? Damian Reply research.net kanaga sciencedirect big data base Ernesto Introduction about quantum dots in nanotechnology Praveena Reply what does nano mean? Anassong Reply nano basically means 10^(-9). nanometer is a unit to measure length. Bharti do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment? Damian Reply absolutely yes Daniel how to know photocatalytic properties of tio2 nanoparticles...what to do now Akash Reply it is a goid question and i want to know the answer as well Maciej characteristics of micro business Abigail for teaching engĺish at school how nano technology help us Anassong Do somebody tell me a best nano engineering book for beginners? s. Reply there is no specific books for beginners but there is book called principle of nanotechnology NANO what is fullerene does it is used to make bukky balls Devang Reply are you nano engineer ? s. fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball. Tarell what is the actual application of fullerenes nowadays? Damian That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes. Tarell what is the Synthesis, properties,and applications of carbon nano chemistry Abhijith Reply Mostly, they use nano carbon for electronics and for materials to be strengthened. Virgil is Bucky paper clear? CYNTHIA carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc NANO so some one know about replacing silicon atom with phosphorous in semiconductors device? s. Reply Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure. Harper Do you know which machine is used to that process? s. how to fabricate graphene ink ? SUYASH Reply for screen printed electrodes ? SUYASH What is lattice structure? s. Reply of graphene you mean? Ebrahim or in general Ebrahim in general s. Graphene has a hexagonal structure tahir On having this app for quite a bit time, Haven't realised there's a chat room in it. Cied what is biological synthesis of nanoparticles Sanket Reply how did you get the value of 2000N.What calculations are needed to arrive at it Smarajit Reply Privacy Information Security Software Version 1.1a Good A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place. Kimberly Reply Jeannette has$5 and \$10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
What is the expressiin for seven less than four times the number of nickels
How do i figure this problem out.
how do you translate this in Algebraic Expressions
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?