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qid 160 · business

Question: The Last National Bank has just approved a loan at an interest rate of 6% for 90 days. If the interest charge on the loan is $36, how much is the principal of the loan?

  1. $3000
  2. $2600
  3. $2200
  4. $2800
  5. $3200
  6. $2000
  7. $2100
  8. $1800
  9. $2500
  10. $2400

Our answer: J. $2400 Source quote machine-checked (exact quote)

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How it was answered

Stored formula / worked method, replayed by code

Simple interest loan principal derivation problem

card: formula · card sha256 85914d0660cfea5d…

Current source

Mathematics LibreTexts (Prealgebra 1e, OpenStax), Section 6.04 "Solve Simple Interest Applications"

https://math.libretexts.org/Bookshelves/PreAlgebra/Prealgebra_1e_(OpenStax)/06:_Percents/6.04:_Solve_Simple_Interest_Applications

“If an amount of money, P, the principal, is invested for a period of t years at an annual interest rate r, the amount of interest, I, earned is I = Prt”

Source quote machine-checked (exact quote)

retrieved 2026-09-18T02:01:59.256Z

page text sha256 6d157726632a68bc… · content sha256 52f9e41634eb373c…

addendum formula_qid160.formula_ADDENDUM_source_rs20260918T020159Z · sha256 4345b9e144b5644f… · replaces the version below, addendum sha256 deb5ce417e991eba…

Earlier version (superseded)

https://en.wikipedia.org/wiki/Interest#Simple_interest

Source weak (http_get_200_text_and_question_terms)

retrieved 2026-09-17T00:31:25.778Z

page text sha256 6e22a88325f7ba69… · content sha256 —

addendum formula_qid160.formula_ADDENDUM_source_relabel_unverified20260917T012453Z · sha256 deb5ce417e991eba… · replaces the version below, addendum sha256 35ca040ac85e016a…

Earlier version (superseded)

https://en.wikipedia.org/wiki/Interest#Simple_interest

Source weak (http_get_200_text_and_question_terms)

retrieved 2026-09-17T00:31:25.778Z

page text sha256 6e22a88325f7ba69… · content sha256 —

addendum formula_qid160.formula_ADDENDUM_source_bf20260917T003125Z · sha256 35ca040ac85e016a… · replaces the version below, addendum sha256 fc2369448cd62416…

Earlier version (superseded)

No public source has been found for this card yet (5 places checked internally).

addendum formula_qid160.formula_ADDENDUM_source · sha256 fc2369448cd62416…

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