AnswersAlgebra II - MA3111 A-CRAdding and Subtracting Rational Expressions

Investing Answers

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Sally’s parents deposited $15,000 into a college savings account on her third birthday. The account had an interest rate of 9.6% compounded annually. They were hoping that the money would double twice by the time she was 18 years old. Using the rule of 72, will their hopes come true?

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A
Yes, the $15,000 will double each 7.5 years. In 15 years, it will double twice.
B
Yes, the $15,000 will double in 7.5 years and be four times as much in 15 years.
C
No, the $15,000 will only double once in 15 years, not double twice.
D
No, it will take 30 years for the $15,000 to double twice.
8

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?

Question illustration
A
Sylvia will double her money first, in approximately 9 years.
B
Manuel will double his money first, in approximately 10 years.
C
Manuel will double his money first, in approximately 9 years.
D
Sylvia will double her money first, in approximately 10 years.
9

Which descriptions about simple interest and yearly compounded interest are true? Select four options.

A
Only compound interest has an exponent in its formula.
B
Simple interest is earned on principal and interest.
C
Compound interest earns more money than simple interest at the same rate for the same amount of time.
D
Simple interest earns more money than compound interest at the same rate for the same amount of time.
E
Simple interest is only earned on the original principal investment.
F
Only compound interest earns the same interest amount every year.
G
Only simple interest uses time in its formula.
H
Compound interest is earned on principal and interest.

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