Answer:
57/40
Step-by-step explanation:
Find common denominators, note that what you do to the denominator, you must do to the numerator:
First, multiply 5/8 with 5 to both the numerator and denominator:
(5/8) x (5/5) = 25/40
Next, multiply 4/5 with 8 to both the numerator and denominator:
(4/5) x (8/8) = 32/40
Combine the numerators:
(25 + 32)/40 = (57)/40
57/40 is your answer.
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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