Divide

(18x^8-8x^4+10)x/(2x)

Use the product rule to simplify
3^2*3^6*3^8

Write the number without exponents
5.56 X 10^5

the second one uses the power rule where you keep the base and add the exponents --> base is 3, add exponents 2+6+8, so the answer is 3^16

the last one is just moving the decimal place 5 places to the right. the answer is 556000