Chelsea bought a scarf at the sale price of $30. The original cost of the scarf was $40.
What percent represents the discount that Chelsea received when buying the scarf?

Consider the table below. x y -1 -5 0 5 1 11 2 13 3 11 complete the standard form equation representing the quadratic relationship displayed above, where a, b, and c are constants.

Given: m∠ adb = m∠cdb ad ≅ dc prove: m∠ bac = m∠bca lol

The coverage of a base station of a telecommunication company forms a disk with a radius of (kilometers). let be the distance of a cellphone from a base station. assume that the location of cellphones in use are randomly uniformly distributed within the disk. calculate the mean and variance for the random variable.