Answer:
Standard form = 3.4 × 10^9
Expanded form = 3,000,000,000 + 400,000,000
Explanation:
Before we solve this let understand what a standard form and expanded form are:
Standard form is a way of writing down very large or very small numbers easily i.e a way to make a very large, large or very small number more legible to read. Standard form are always expressed in the power of 10.
Expanded form is we have to expand a number to show the value of each of its digits in the number. Just like the opposite of standard form. Writing a large or small in a larger way without adding or subtracting its value.
Therefore to write three billion four hundred million in standard form and expanded form.
(3,400,000,000)
Standard form = 3.4 × 10^9
Expanded form = 3,000,000,000 + 400,000,000