Is 21:45 equivalent to 7:15

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?

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

What expression is equivalent to (84+16)