Simplify expression giving brainliest to first correct answer

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?

Why is partitioning a directed line segment into a ratio of 1: 3 not the same as finding the length of the directed line segment?

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr2. write your answer in scientific notation.