When you are multiplying an exponent by an exponent that is outside the parentheses you multiply the exponential values together (Remember the power rule (b^n)^m
= b^(nm)?). Then add the 4 (Remember product rules a^na^m = a^(n+m)?)
\(( y^{3})^{5}* y^{4} = (y^{15} )* y^{4}= y^{19}\)
Your answer is B. y^19
