Two fifths of the instruments in the marching band are brass one eighth of the brass instruments are two of us what fraction of the band is tubas

The polygon tool to draw a rectangle with a length of 5 units and a height of 3 units. one of the sides of the rectangle falls on line ab , and the rectangle has a vertex of a. each segment on the grid represents 1 unit.

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Which expression gives the exact value of x?