Will give !

i got multiple of these guys, i've been stuck on them for a week now. i need the answer and an explanation on this one.

3x = 729 solve for x plz . it's urgent. will mark

In the diagram, be and ad pass throughthe center of circle o, and the area ofsector aoc is 47.45 square units. what isthe area of sector boc? use the value =3.14, and round your answer to two decimalplaces.22.33 square units25.12 square units

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2