The sum of the first 15 terms of an arithmetic series is 615. Given that the fifth term is 53, find the common difference.

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radii and altitudes is 2: 1? submit