16. which of the following are complementary angles?
a. 71° and 19°
b. 90° and 90°
c. 90° and 45°
d. 15° and 30°

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

The function v(r)=4/3pir^3 can be used to find the volume of air inside a basketball given its radius. what does v(r) represent