Question 769859
10000^3.21^x = 340000
3.21^x(log10000)=log340000
3.21^x=log(340000)/log(10000)
3.21^x=1.383
xlog(3.21)=log(1.383)
x=log(1.383)/log(3.21)
x=0.278 (does not match any of given answers)
..
128(11.36)^x = 100
(11.36)^x = 100/128
xlog(11.36)=log(100/128)
x=log(100/128)/log(11.36)
x=-0.102(ans D)