The surface area of a sphere is found using the formula sa=4πr^2 where r is the radius. if the surface area of a sphere is 144π square feet, what is the radius, in feet

Which of the following transformations does not preserve congruence? * 5 points a. (x, y) → (y − 3, x − 3) b. (x, y) → (x + 5, y − 1) c. (x, y) → (y + 9, −x + 2) d. (x, y) → (3x + 1, 3y − 2)

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!