Courtney takes \(2.4 \times 10^ 4\) steps during her a long-distance run. Each step covers an average of 810 mm. What total distance (in mm) did Courtney cover during her run? Write your answer in scientific notation. Then convert the distance to the more appropriate unit kilometers. Write that answer in standard form.

Social Studies

The U.S. public debt as of October 2010 was \($9.06 \times 10^{ 12}\) . What was the average U.S. public debt per American if the population in 2010 was \(3.08 \times 10^ 8\) people?

Communicate Mathematical Ideas

How is multiplying and dividing numbers in scientific notation different from adding and subtracting numbers in scientific notation?

Explain the Error

A student found the product of \(8 \times 10^ 6\) and \(5 \times 10^ 9\) to be \(4 \times 10^ {15}\) . What is the error? What is the correct product?

Communicate Mathematical Ideas

Describe a procedure that can be used to simplify\(\large\frac{ ( 4.87 \times 10^{12} ) - ( 7 \times 10 ^{10} )}{( 3 \times 10^ 7 ) + ( 6.1 \times10 ^8 )}\). Write the expression in scientific notation in simplified form.