Answer:
The answer is C
Step-by-step explanation:
Wires are electrical and emit kinetic energy. Since the kinetic energy has nowhere to go in the broken wire, it changes into thermal energy. For example, if you use a phone charger for too long, it gets hot. It’s because the kinetic energy is turning into thermal energy.
I’m not sure about the problem on the right but for the first one: The length of AC is 21 units.
<span>Answers:
V = (15-2x)(8-2x)x
V = 120x -46x²+ 4x³
V' = 120 -92x + 12x²
0 = 120 -92x + 12x²
x = (92±52)/24
x = 6 or 5/3
Pick x = 5/3
Volume = (15-2*5/3)(8-2*5/3)*5/3
= 90.74 inÂł
To justify x = 5/3 is the max
V" = -92 + 24x
V"(5/3) = -92 + 24(5/3) <0 negative.
Volume V(5/3) is max because the function is
concave down with V"<0.</span>
