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SS3: MATHEMATICS - 2ND TERM

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  1. Matrices I | Week 1
    6 Topics
  2. Matrices II | Week 2
    1 Topic
    |
    1 Quiz
  3. Commercial Arithmetic | Week 3
    7 Topics
    |
    1 Quiz
  4. Coordinate Geometry | Week 4
    8 Topics
    |
    1 Quiz
  5. Differentiation of Algebraic Expressions | Week 5 & 6
    7 Topics
  6. Application of Differentiation | Week 7
    4 Topics
    |
    1 Quiz
  7. Integration | Week 8
    8 Topics
    |
    1 Quiz



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Items such as cars and electrical equipment lose value as time passes. This loss in value is called depreciation. Depreciation is usually given as a percentage of the value of the item at the beginning of the year.

Example:

A television costing #16000 depreciates by 25% in the first year and 20% in the second year. Find its value after two years.

Solution

1st year: \( \frac{25}{100} \scriptsize \; \times \; 16000 \)

= #4000

Value = 16000 – 4000

=12000

2nd year: \( \frac{20}{100} \scriptsize \; \times \; 16000 \)

= #2400

Value= 12000 – 2400

= #9600.

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