Question

log[7](x)=5

Answer 1

\[\log_7x=5 \Rightarrow 7^{5} = x\]

Answer 2

x=5/log(7)

Answer 3

Use the property:
\[\log_bx = a \Rightarrow b^{a} = x\]

Answer 4

\[-65+47.5(1+r)^-7+33(1+r)^-13+24(1+r)^-22=0\]