Answer:
Answer = 
Step-by-step explanation:
Step 1:-
simplifying 

base are equal powers are added
on simplification 
Step-by-step explanation:
ans is $351.271875 of total cost
In some cases, there are better solutions than factoring. Consider, for example the quadratic equation x^2+x+1, which is much easier to solve using the quadratic formula than by factoring.
A is the correct answer!!!
the last one
Step-by-step explanation:
it is 40/100