Rotating light a searchlight rotates through one complete revolution every 4 seconds. how long does it take the light to rotate through 90°?

Which is the graph of this function 3 square root of x plus one if

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.

Is the number 128.439 a rational number