Question

Select the correct answer.

68600
A) 6.86 × 104
C) 0.686 × 10²
B) 0.686 × 10¹
D) 6.86 x 10²

Answer 1

A) 6.86×10⁴

Explanation:

You want to write 68600 in scientific notation.

Expanded form

The number 68600 can be written in expanded form with exponents as ...

68600 = 6×10⁴ +8×10³ +6×10² +0×10¹ +0×10⁰

The left-most term of this sum tells you the exponent in scientific notation:

68600 = 6.86×10⁴