  ### Home > CCAA8 > Chapter 5 Unit 6 > Lesson CCA: 5.2.1 > Problem5-55

5-55. This problem is a checkpoint for laws of exponents and scientific notation. It will be referred to as Checkpoint 5A.

Simplify each expression. In parts (e) through (f) write the final answer in scientific notation.

1. $4^2·4^5$

1. $(5^0)^3$

1. $x^{−5}·x^3$

1. $(x^{−1}·y^2)^3$

1. $(8\times10^5)·(1.6\times10^{−2})$

1. $\frac { 4 \times 10 ^ { 3 } } { 5 \times 10 ^ { 5 } }$

Check your answers by referring to the Checkpoint 5A materials located at the back of your book.

Ideally, at this point you are comfortable working with these types of problems and can solve them correctly. If you feel that you need more confidence when solving these types of problems, then review the Checkpoint 5A materials and try the practice problems provided. From this point on, you will be expected to do problems like these correctly and with confidence.

Answers and extra practice are located in the back of your printed textbook or in the Reference Tab of your eBook.
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