The ellipse with foci at (4, 0) and (-4, 0); y-intercepts (0, 3) and (0, -3).

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

For each proportion find the unknown number x 1/5/8=×/15