Final answer:
To write 7.44 billion in standard notation, it is expressed as 7,440,000,000. To express 7.44 billion in scientific notation, it is written as 7.44 × 10^9.
Step-by-step explanation:
To write 7.44 billion in standard notation, you would express it as 7,440,000,000. This is the straightforward expression of the number without any exponents or powers of ten. However, to express this astronomical sum of money in scientific notation, you would write it as 7.44 × 109.
In scientific notation, the number is represented in a form that uses a base number (in this case, 7.44) followed by a × 10 raised to an exponent (the power of 10), which indicates how many places the decimal should be moved.