Answer:
C
Step-by-step explanation:
Remark
You must do the changes in order. Add 1 then multiply by 2
- First entry: 6
- Add 1: 6 + 1 = 7
- Multiply by 2 = 2*7 = 14
- Add 1: 14 + 1 = 15
- Multiply by 2: 15 * 2 = 30
Answer: 7 14 15 30
19. Perimeter of rectangle = 2(l + b)
l = 25m
b = 16m
Perimeter of rectangular park = 2 (25 + 16)
= 50 + 32
= 82m
Perimeter of square park = 82m
(given that, perimeter of rectangular and square park are equal)
Perimeter of square = 4a
4a = 82
a = 82/4
a = 20.5m
Area of square park = a²
= 20.5²
= 420.25m²
20. Perimeter of regular hexagon = 6a
a = 2.5
6a = 6 × 2.5
= 15cm
21. Perimeter of regular decagon = 10a
a = 8
10a = 10 × 8
= 80cm
Sarah spent $1,083 because $57*38=$2,166 and $2,166/2=$1083
