Answer:
(b) 15 over 56 times a squared
Step-by-step explanation:
You want the product of (5/8a) and (3/7a).
Multiplication
The commutative and associative properties of multiplication help you find this product:
[tex]\dfrac{5}{8}a\,\times\,\dfrac{3}{7}a = \left(\dfrac{5}{8}\cdot\dfrac{3}{7}\right)\times (a\cdot a)=\dfrac{5\cdot3}{8\cdot7}a^2=\boxed{\dfrac{15}{56}a^2}[/tex]
