Hello,
I suppose a and b are vectors
and i and j unit's vectors

5 times a number decreased by thirteen. Not sure if there should be the =12, so I didn't include it in the verbal description. Hope it helps!
Answer:
The function show the value of the machinery after "t" years.
So After "4" years... Input "t" as 4 to get its value
f(t) = 12,500 - 1,600(4)
=$6,100
OPTION C IS LEGIT!!!
Answer:
7.68
Step-by-step explanation: