Calculate the area of the lid of the collection box

Area of lid = (area of rectangle) + (area of semicircle)
  = (45 cm)*(22 cm) + (1/2)*(π*(13 cm)²)
  = 990 cm² + 265.46 cm²
  = 1255.46 cm²

The area of the lid is about 1255.5 cm².

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.