The number 0.000345 in standard form is:
34.5 × 105.
3.45 × 10⁴.
3.45 × 10⁻³.
3.45 × 10⁻⁴.
The number 234.5 × 10³ written in standard form is:
2.345 × 10¹.
2.345 × 10⁴.
2.345 × 10².
2.345 × 10⁵.
Given that 0.00078 can be written as a × 10n,
where 1 < a < 10, then the value of n is:
3.
-3.
4.
-4.
0.00875 can be written in standard form as:
8.75 × 10⁻³.
8.75 × 10⁻⁴.
8.75 × 10³.
875 × 10⁴.
The number 163.35 × 10⁻³ expressed in standard form is:
1.6335 × 10⁻¹.
16335 × 10⁻².
16.335 × 10⁻².
1.6335 × 10¹.
