The number 234.5 × 10³ written in standard form is:
2.345 × 10⁵.
2.345 × 10⁴.
2.345 × 10².
2.345 × 10¹.
Given that 0.00078 can be written as a × 10n,
where 1 < a < 10, then the value of n is:
4.
-3.
-4.
3.
0.00875 can be written in standard form as:
8.75 × 10⁻³.
875 × 10⁴.
8.75 × 10³.
8.75 × 10⁻⁴.
The number 0.000345 in standard form is:
3.45 × 10⁻³.
3.45 × 10⁴.
34.5 × 105.
3.45 × 10⁻⁴.
Expressing 0.0597 in standard form gives:
5.97 × 10².
6.0 × 10⁻².
5.97 × 10⁻².
6.0 × 10².
