Chapter 1, Problem 30P

Perform the following operations and leave the answer in engineering notation:

1. $\left(6\times {10}^{-3}\right)\left(4\times {10}^4\right)=$
2. $\left(70\times {10}^5\right)\left(0.02\times {10}^3\right)=$
3. $\left(0.001\times {10}^7\right)\left(600\times {10}^4\right)/\left(4\times {10}^3\right)=$
4. ${\left(5.2\times {10}^4\right)}^2\left(82\times {10}^{-3}\right)/\left(2.02\times {10}^3\right)=$