Sagot :
about 5 minutes: 60/4=15 then 15*3=45 and so 45/9 is 5 about 5 minutes an application
[tex] \frac{3}{4}=75 \\
\\ \frac{75}{9}= \frac{x}{1} \\
\\ \frac{9x}{9}= \frac{75}{9} \\
\\ \frac{75}{9}=8.3 \\
\\ x=8.3 \\ [/tex]