According to the line plot, what is the difference in the totals of the runners who ran 1/2 of a mile and the runners who ran 1/3 of a mile?

The radius of the circle is 4 cm and the measure of the central angle is 90° the area of the sector with a central angle measuring 90° and radius of length 4 cm is vt cm the triangle in the sector is 4 cm the area of the triangle is v/cm² the area of the segment of the circle is (471 - ) cm?

Look at attachment. has all info needed. need

Precalculus question, image attached.