Question

150-(1.78)^x=0

Answer 1

(1.78)^x = 150
xlog(1.78)=log(150)
x=8.6897

Answer 2

\[150=1.78^x\]
\[ln(150)=xln(1.78)\]
\[x=\frac{ln(150)}{ln(1.78)}\]

Answer 3

what slaabak wrote!

Answer 4

ok. thanks everyone. medals.