The measure of one of the acute angles of a right triangle is decreasing at the rate of π / 36 rad / sec. If the length of the hypotenuse is a constant 40 cm, how fast is the area changing when the acute angle is π / 6?

The answer is in the attachment

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )