Problem
Part 2 of 3 Points: 0 of 1 Do the following operations without a calculator. Be sure to express answers in scientific notation You may round your answers to one decimal place (as in $32 \times 10^{5}$ ) a. $\left(3 \times 10^{5}\right) \times\left(2 \times 10^{10}\right)$ b. $\left(2 \times 10^{6}\right)+\left(7 \times 10^{5}\right)$ c. $\left(8 \times 10^{9}\right)-\left(4 \times 10^{6}\right)$ (Use the multiplication symbol in the math palette as needed) b. $\left(2 \times 10^{6}\right)+\left(7 \times 10^{5}\right)=$
Solution
Step 1 ：The question is asking to add two numbers in scientific notation. The numbers are \(2 imes 10^{6}\) and \(7 imes 10^{5}\).
Step 2 ：To add these numbers, we need to make sure that the powers of 10 are the same. In this case, we can rewrite \(7 imes 10^{5}\) as \(0.7 imes 10^{6}\).
Step 3 ：Then, we can add the coefficients (the numbers in front of the powers of 10) together.
Step 4 ：The sum of \(2 imes 10^{6}\) and \(0.7 imes 10^{6}\) is \(2.7 imes 10^{6}\).
Step 5 ：Final Answer: \(\boxed{2.7 imes 10^{6}}\)
