How can we define the radius of a circumference?

Write the sentence as an equation. b increased by 281 is d

Simplify 4 square root of 2 end root plus 7 square root of 2 end root minus 3 square root of 2 . (1 point) 2 square root of 8 8 square root of 2 8 square root of 6 6 square root of 8

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall