Comparing Quantities Quiz

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Questions and Answers

In calculating simple interest, what does the 'amount' refer to?

  • The initial sum of money
  • The total money after interest is added (correct)
  • The money borrowed
  • The interest earned

What is the formula to calculate simple interest?

  • (P + R + T)/100
  • P x R x (1 + T)
  • P x (1 + R x T)
  • P x R x T (correct)

If the principal is $1000, the rate is 5%, and the time is 2 years, what is the simple interest earned?

  • $50 (correct)
  • $150
  • $100
  • $200

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Study Notes

Simple Interest

  • In calculating simple interest, the 'amount' refers to the final amount of money accumulated after interest has been added to the principal.

Calculating Simple Interest

  • The formula to calculate simple interest is: Simple Interest (SI) = Principal (P) x Rate (R) x Time (T)

Example Problem

  • If the principal is $1000, the rate is 5% (or 0.05), and the time is 2 years:
    • The simple interest earned can be calculated using the formula: SI = $1000 x 0.05 x 2 = $100

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