Confused as to what i need to do. ?

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?

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

Arestaurant added a new outdoor section that was 8 feet wide and 6 feet long. what is the area of their new outdoor section