The amount of money invested at of interest is .
Further explanation:
Given:
A college student is working as a waiter in a restaurant on a board walk at a beach and earned during summer vacation
The student invested part of the money and rest at .
At the end of year student receive in interest.
Concept used:
The interest can be calculated as follows:
Here, is the invested money, is the interest rate and is the time in years.
Calculation:
Consider as the money invested at of interest and rest money is invested at interest.
The amount of money invested at interest is .
The total interest amount for two accounts can be calculated as follows:
The percentage can be converted as follows:
Simplify the above equation to obtain the value of as follows:
Further simplify the above equation to obtain the value of as follows:
From the above calculation it is concluded that the amount of money invested at of interest is .
The amount of money invested at of interest is calculated as follows:
The amount of money invested at of interest is .
Thus, the amount of money invested at of interest is .
Learn more:
1. Learn more about problem on percentage: brainly.com/question/1856923
2. Learn more about problem on interest rate brainly.com/question/3724002
Answer details:
Grade: Middle school
Subject: Mathematics
Chapter: Simple interest
Keywords: Percentage, interest rate, money amount, invested, time, student, restaurant, beach, summer vacation, waiter.