An investment lost approximately 5% of the balance each month for the past year. The amount of the investment on January 1st of last year was $10,000. Which of the following functions, I, models the amount of the investment (in thousands of dollars) at the end of month, n, where 1≤n≤12?Choose 1 answer:(A) I(n)=10⋅(1.05)n thousand dollars(B) I(n)=10−0.05n thousand dollars(C) I(n)=10⋅(0.95)n thousand dollars(D) I(n)=10+0.95n thousand dollars
Q. An investment lost approximately 5% of the balance each month for the past year. The amount of the investment on January 1st of last year was $10,000. Which of the following functions, I, models the amount of the investment (in thousands of dollars) at the end of month, n, where 1≤n≤12?Choose 1 answer:(A) I(n)=10⋅(1.05)n thousand dollars(B) I(n)=10−0.05n thousand dollars(C) I(n)=10⋅(0.95)n thousand dollars(D) I(n)=10+0.95n thousand dollars
Understand the problem: Understand the problem.The investment loses 5% of its balance each month. This means that each month, the investment retains 95% (100%−5%) of its value from the previous month. We need to find a function that models this situation over a period of 12 months.
Analyze the choices: Analyze the answer choices.We need to determine which function correctly represents the investment losing 5% of its value each month. The function should show the investment amount decreasing over time, not increasing, and it should be a function of n, the number of months.
Evaluate the answers: Evaluate the answer choices.(A) I(n)=10×(1.05)n thousand dollars - This function suggests the investment is increasing by 5% each month, which is incorrect.(B) I(n)=10−0.05n thousand dollars - This function suggests a linear decrease, which is not how percentage losses work.(C) I(n)=10×(0.95)n thousand dollars - This function suggests the investment retains 95% of its value each month, which matches the problem statement.(D) I(n)=10+0.95n thousand dollars - This function suggests the investment is increasing each month, which is incorrect.
Choose the function: Choose the correct function.Based on the analysis in Step 3, the correct function is (C) I(n)=10×(0.95)n thousand dollars, as it correctly models a 5% loss each month.
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