Answer:2
Explanation:
When raising an exponential expression to a power, you need to multiply the exponents. Applying this rule to (y^3)^5, we get (y^3)^5 = y^(3*5) = y^15.
So, (y^3)^5 • y^4 = y^15 • y^4 = y^(15+4) = y^19.
Therefore, the simplified expression is y^19, and the answer is 2.