A right triangle has legs of 15 inches and 20 inches whose sides are changing. The short leg is increasing by 7 in/sec and the long leg is shrinking at 10 in/sec. What is
the rate of change of the area?

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%

answer: translate the circles so they share a common center point and dilate circle y by a scale factor of 3.