Answer: The sum of the equation is 18
Step-by-step explanation:
The main property is as follow
(A^p)^q=A^pxq
so only Sam's work is correct because
(8^4)^5 x(7^3)^9=(8^4x5)x(7^3x9)=8^20x 7^27
This is the distributive property. You take what is outside of the parenthesis and DISTRIBUTE it inside the parenthesis.
That might be the diameter of the circle