Math Problem Statement
According to the Bureau of Labor and Statistics, in 2022 “Average expenditures per consumer
unit for 2022 were $70,021,” where “consumer units include families, single persons living
alone or sharing a household with others but who are financially independent, or two or more
persons living together who share expenses.”
a. “The average American lives on $𝐷𝐷 per day” is a common type of statistic used (not just
about Americans either). Using the information above, determine a reasonable amount
that could represent 𝐷𝐷 in this statistic. Be sure to explain your reasoning.
b. Using your average dollar amount per day for an American, for how many days could an
American live on one trillion dollars? How many years is that? Decades? Centuries?
Millennium?
c. The average life expectancy of an American in 2015 was about 79 years
(data.worldbank.org). With this in mind, about how many Americans could live their
whole lives on one trillion dollars?
Solution
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Math Problem Analysis
Mathematical Concepts
Basic Arithmetic
Unit Conversion
Exponential Estimation
Formulas
Daily Expenditure (D) = Annual Expenditure / 365
Number of Days = $1 Trillion / Daily Expenditure
Years = Days / 365
Lifetime Expenditure = Daily Expenditure × 365 × Life Expectancy
Number of Americans = $1 Trillion / Lifetime Expenditure
Theorems
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Suitable Grade Level
Grades 9-12
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