53kg, 42kg, 41kg, 60kg, 44kg, 49kg. calculate the mean weight giving your answer correct to two decimal places

Mean is simply the average of all numbers and to find it you add up all the numbers and divide for how many numbers there are (in this case we 6 numbers, 6 masses).

So, 53+42+41+60+44+49 = 289 kg

Mean = 289/6 = 48,1666666

So 48,17 is your answer

Area of the sector = 35/360 x π(80)² = 1954.769m²

Area of the triangle = 1/2 (80)(80) sin(35) = 1835.445m²

Area of the shaded part = 1954.769 - 1835.445 = 119m² (3 s.f.)

Area of the sector = 40/360 x π(8)² = 22.340 cm²

Area of the triangle = 1/2 (8)(8) sin(40) = 20.569 cm²

Area of the shaded part = 22.340 - 20.569 = 1.77 cm² (3 s.f.)