Answer:
a) 
b) 
Step-by-step explanation:
From the question we are told that:
Rate r=90 units per hour
Setup cost =20
Operating Cost =26
Units=40000
Generally the equation for Total cost is mathematically given by


Differentiating

Equating equ 1 to zero


Therefore
Substituting n
For Equ 1

F(n)>0
For Equ 2

F(n)'<0
Step-by-step explanation:
PART A
Diego deposited-$10000
interest rates-6%(4years)
6/100 × 10,000/1=
60,000/100=600
600 × 4= 2400
PART B
if Diego closes his account after 4years he is go to receive
deposited among + interest
10,000 + 2400 = 12,400
Your slope is -2 over -6 which is -1/-3
Answer:
4
Step-by-step explanation:
Hope this helped :)