A circle is tangent to 3 sides of a rectangle whose dimensions are 8 x 15. What is the area of the circle? A. 16pi
B. 56.25pi
C. 64pi
D. 120pi
E. 225pi

Which term best describes the association between variables a and b

Arley is building a model of a city map. in one part of the city, three roads form a right triangle, which harley draws as triangle abc, with the following measures: m∠b=90° and m∠a=30°. in his scale model, the hypotenuse of triangle abc, ac¯¯¯¯¯¯¯¯, has a length of 817−−√ cm. what is the value of a (the length of bc¯¯¯¯¯¯¯¯)?

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?