Rachel has tossed a fair coin ten times. It landed heads up every time. Is this POSSIBLE?
Explain

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3