13. Exponents and Polynomials

Simplify the expression.

$\frac{y^{27}}{y^9}$

Simplify the expression. Hint: rewrite using exponents first.

$\frac{64}{16}$

Simplify the expression.

$(-4t{)}^0,t\ne 0$

Use the quotient rule to rewrite each expression, then simplify.

$-\frac{12b^{11}}{4b^7}$