Help please!! and ty

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12