In 2001, box office sales for moviegoers in the US totaled 8.4 billion dollars. Which of these is equivalent to 8.4 biillion?
A.8.4x10^9
B. 8.4x10^-6
C. 8.4x10^-9
D. 8.4x10^6
A
Right.
To determine which option is equivalent to 8.4 billion, we can convert 8.4 billion to scientific notation and compare it to the given options.
Scientific notation represents a number in the form of M x 10^N, where M is a value between 1 and 10, and N is an integer indicating the power of 10.
To convert 8.4 billion to scientific notation, we will move the decimal point to the left until we have a number between 1 and 10. This will give us 8.4 x 10^9.
Option A, 8.4 x 10^9, matches our conversion, indicating that it is equivalent to 8.4 billion. Therefore, the correct answer is A.