Find the missing length indicated.
Help pls

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?

Measures of the angle of r, 31 s (x+4) t (3x+9)

Asphere has a diameter of 10 in. what is the volume of the sphere?