Answer:
exactly what it says
Step-by-step explanation:
you see the numbers on f and g??
(F x G)x(-1)
It would be 10.932 years or 10.9 to the tenth
The number you need is 16 all you have to do is work out the problem and try to understand it they are trying to confuse you don't need an equation.
Hope this help!
Have a Great day mate !!