Here is a sequence 5, 10, 20, 40, 80
a) What is the term-to-term rule of the sequence?
b) The 10th term in the sequence is 2560.
What is the 11th term in the sequence?

Find the equation of the ellipse with the following properties. the ellipse with foci at (0, 6) and (0, -6); y-intercepts (0, 8) and (0, -8).edit: the answer is x^2 over 28 + y^2 over 64 = 1