10. The cost of membership in a discount grocery club includes a month 6 months is $80, and the total cost of membership for 1 year is $110.

charge and a one-time joining fee. The total cost of membership for

Write and solve a system of equations to find the monthly charge and

the joining fee.

General formula to find the area of a circle

To find a sector area of a circle


NUMBER 14
Given information:
r = 12 cm
degree of sector = 110° (use the angle on the shaded area)

The area of the sector:





sector = 44 × 3.14
sector = 138.16

The area is 44π ≈ 138.16 cm²

NUMBER 16
Given information:
r = 30 yards
degree of sector = 15° (use the angle on the shaded area)

The area of the sector:





sector = 37.5 × 3.14
sector = 117.75

The area is 37.5π ≈ 117.75 yd²