Can someone help me answer these questions in standard form please.
Please answer all of them.

Combined megan and kelly worked 60 hours. kelly worked twice as many hours as megan. how many hours did they each worked?

The circumference of a redwood tree trunk is 20π ft, and it is 100 ft tall. what is the approximate volume of the redwood tree trunk? 1,000π ft3 10,000π ft3 4,000π ft3 40,000π ft3

Find the greatest common factor of the followig monomials 46g^2h and 34g^6h^6