Please answer this i am literally THE WORST AT ALGEBRA!!!

Point m is located at (-4, -6). what is located 4 units from point m? ( its on a coordinate plane by the way. )

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.

As a salesperson you get $23/ day and $3.60/each sale you make. if you want to make at least $84. in one day, how many sales would need to make? a 15b 16c 17d 18