Investing Answers

An initial amount of $800 is invested in a compound savings account with an annual interest rate of 4.5%. Using the formula , what is the balance after five years?

Uta invests an amount into a compound interest investment account that pays 6% a year. After six years, she withdraws her total balance of $500. Using the formula , how much money did Uta initially invest?

George’s parents are saving for his college fund. They put $5,000 into an interest bearing account with a compound interest rate of 5.5%. George’s parents want to determine what the balance of his college fund account will be after 15 years. Using the formula , which is the correct substitution for the formula?

Which equation demonstrates the use of a simple interest formula, , to compute the interest earned on $70 at 3% for 12 years?

Ted and Alan are in a race to double their money. Ted feels he will win if he puts his $4,000 into a savings account offering 4.5% interest compounded annually. Alan feels he will win because he intends to put his $1,000 into a savings account offering 6% interest compounded annually. Using the rule of 72, , who will win, and how many years will it take to double his money?

Three friends decide that they each want to be able to buy a new boat in five years. Vanore puts $1,000 in a savings account with a simple interest rate of 4.5%. Keir invests $1,200 in a standard savers account with a simple interest rate of 4%.Omar invests $950 in a junior achievers account with a 6% annual compound interest rate.Who will have the most money to spend on a new boat at the end of the five years? Use the formula for simple interest and for compound interest. Round to the nearest dollar.

Sylvia invested $500 in an account compounded annually with an interest rate of 8%. Manuel invested $600 in an account with a compound interest rate of 7.25%. Using the rule of 72, , who will double their money first?

Herky and Elaina want to compare their investment accounts to see how much they will have in the accounts after eight years. They substitute their values shown below into the compound interest formula.Compound Interest AccountsNamePrincipalInterest RateNumber of YearsCompoundedHerky$5005%8Once a yearElaina$4006%8Once a yearWhich pair of equations would correctly calculate their compound interests?