Can someone help me. Will Mark brainliest.

Pls yall i really need the answer fr fr

What is the gcf of 20c^3-5c^4+30c^6

Darren earned $663.26 in net pay for working 38 hours. he paid $118.51 in federal and state income taxes, and $64.75 in fica taxes. what was darren's hourly wage? question options: $17.45 $19.16 $20.57 $22.28