In the given expression (1.05)2 *x = 44.1, find the value of x.

2024

In the given expression (1.05)2 *x = 44.1, find the value of x.

  1. A.

    40.00

  2. B.

    40.01

  3. C.

    42.00

  4. D.

    42.01

Show answer & explanation

Correct answer: A

Concept: To find an unknown factor x in an equation of the form a × x = b, isolate x by dividing both sides by a: x = b / a. Here a is (1.05)2, so first square the decimal (multiply it by itself) before dividing.

Application:

  1. Compute (1.05)2 by multiplying 1.05 × 1.05, which gives 1.1025.

  2. Substitute into the given equation: 1.1025 × x = 44.1.

  3. Isolate x by dividing both sides by 1.1025: x = 44.1 / 1.1025.

  4. Carrying out the division gives x = 40.00.

Cross-check: Multiplying the result back, 40.00 × 1.1025 = 44.1, which matches the right-hand side of the original equation, confirming x = 40.00.

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