A particular capacitor is designed with two plates of different areas, A1 and A2, such that A1 < A2. The capacitor is connected to a 12-volt battery. What is the charge on A1 compared
to the charge on A2?

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

other answer is correct. i had used the radius of the radius somehow. a website:

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).