Step-by-step explanation:
Let the required number be x.
According to the given information:

Hence the required number is 31.
There would be 3 left but fish can't drown so there's 6 left
Hope I helped!
Answer:
17. a)
Step-by-step explanation:
17.
f(x) =x/2, then f(x-3)=(x-3)/2
x=3, f(x-3)=f(3-3)=f(0)=0 (values in table)
f(x-3)+3=0+3=3
18.
f(x) =x/2
f(x-2) for x=5 is f(5-2)=f(3)=3/2
f(x-2)+5=f(3)+5=3/2+5=3/2+10/2=13/2
Yes, his estimate is reasonable. But only if Michael is less than 2 years old.