Question

Please answer all four. I have some answers but I want to make sure I got the right ones and did the process correctly. Thanks! All 4 (-:

1. Identify an equation in standard form for an ellipse with its center at the origin, a vertex at (9, 0), and a co-vertex at (0, 1).

2. Identify an equation in standard form for an ellipse with its center at the origin, a vertex at (11, 0), and a co-vertex at (0, 4).

3. There are 32 pieces of building blocks in a bag: 8 each of blue, green, red, and yellow. Four pieces are chosen at random. Identify the probability that all 4 of the pieces are red.

4. A phone banking password consists of 2 letters followed by 4 digits. The letters B, I, S, and O are not used, and the last digit cannot be 0. How many different passwords are possible?

Answer 1