Because he could only cover 50% of the price 25 by the coupon and 25 which he had.
Answer:
5 amperes will produce the maximum power
Step-by-step explanation:
The power generated by an electrical circuit (in watts) as a function of its current c (in amperes) is modeled by: P(c)= -12c^2 + 120c.
To find out the maximum power we need to find the vertex
formula to find x -coordinate of vertex is 
P(c)= -12c^2 + 120c is given in the form of y=ax^2+bx+c
a= -12, b = 120

c= 5 amperes will produce the maximum power
Questions 1 and 2 are correct.
Question #3 is A
Question #4 is C
Question #5 is C
Answer:
80 and 100 both qualify.
Step-by-step explanation: