Use Exponents to Express the Algebraic Expression Below in a More

Multiple Choice

Use exponents to express the algebraic expression below in a more compact form. $\left( 7 y ^ { 4 } \right) \left( 15 y ^ { 6 } \right)$

A) $1,050 \cdot y$
B) $105 \cdot y ^ { 10 }$
C) $105 \cdot y ^ { 3 }$
D) $105 \cdot y ^ { 24 }$