Simplify.

(a^2*b^4)*(a^3*b^5)

To simplify the expression (a^2*b^4)*(a^3*b^5), you need to add the exponents of like variables.

First, multiply the coefficients: a^2 * a^3 = a^(2+3) = a^5

Next, multiply the variable with the same base: b^4 * b^5 = b^(4+5) = b^9

Therefore, the simplified expression is a^5 * b^9.