The radius of a circle is constantly increasing. At a certain moment, the rate of increase of the circumference is the same as the rate of increase of the area. At that moment, what is the area of the circle? a. 1/pi
b. pi/4
c.4pi
d. pi
e.4/pi

20 ! identify the degree of comparison of the underlined adjective or adverb. read the sentence. for marley, spelling is the most difficult subject. which best identifies the degree of comparison of the underlined adjective or adverb? -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-a. imperativeb. comparativec. superlatived. positive