1.2 Exercise 24

Perform the operations and write the answer in scientific notation.

1. ⓐ $\left(−7.5 \times 10^{8}\right) \left(1.13 \times 10^{−2}\right)$
2. ⓑ $\left(1.24 \times 10^{11}\right) \div \left(1.55 \times 10^{18}\right)$
3. ⓒ $\left(3.72 \times 10^{9}\right) \left(8 \times 10^{3}\right)$
4. ⓓ $\left(9.933 \times 10^{23}\right) \div \left(- 2.31 \times 10^{17}\right)$
5. ⓔ $\left(−6.04 \times 10^{9}\right) \left(7.3 \times 10^{2}\right) \left(−2.81 \times 10^{2}\right)$