Find the volumes of the solids generated by revolving the regions bounded by the graphs of the equations about the given lines.
a. the y-axis
b. the x-axis
c. the line
d. the line

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

36x2 + 49y2 = 1,764 the foci are located at: (-√13, 0) and (√13,0) (0, -√13) and (0,√13) (-1, 0) and (1, 0)edit: the answer is (- the square root of 13, 0) and (the square root of 13, 0)