College of Admission Tests Multan

Exponents

Solve the question of and select the option from the choices A through D/E. Check your Answer and view the explanation.

Question: 3

Which of the following is the standard form of 0.00001275?
  • 1.275 × 10-5
  • 1.275 × 105
  • 127.5 × 10-7
  • 127.5 × 107

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Correct Answer: A

0.00001275

In standard form, the decimal point is placed after one digit from left. Hence; decimal point moves five places from left to right.

So the standard form is 1.275 × 10-5