I’m not sure what you are trying to say in this problem?
(4^9)^5 is equal to 4^45. You multiply 9 and 5 to get 45.
1) 1.2756 x 10^4
2) 1.16464 x 10^5
3) 1.42984 x 10^5
4) 1.392 x 10^6
5) 5.977 x 10^7
6) 9.035 x 10^8
7) 2.6448 x 10^9
SA=2pir^2+2hpir=2pir(r+h)
h=2r=2(2x+3)=4x+6
SA=2pi(2x+3)(2x+3+4x+6)
SA=(4x+6)(pi)(6x+9)
SA=24πx²+27πx+54π
