### Home > INT1 > Chapter 4 > Lesson 4.2.3 > Problem4-88

4-88.

Simplify each expression. In parts (c) and (d) write your answers using scientific notation.

1.  $2^3\cdot5^{-2}$

• $\frac{8}{25}$

1.  $( x y ^ { 2 } ) ^ { 3 } \cdot ( x ^ { - 2 } )$

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

• Remember to write your answer in scientific notation.

1.  $\frac { 4 \times 10 ^ { 2 } } { 5 \times 10 ^ { - 2 } }$

$8000$