Worksheet with four math problems related to area, perimeter, and cost calculations.

I'll solve each problem step by step, checking my calculations carefully.

Problem 4: Betty's bedroom flooring
- Room dimensions: 16 ft long × 15 ft wide
- Cost: $6.00 per square foot

Step 1: Find the area of the room
Area = length × width
Area = 16 × 15
Let me calculate: 16 × 15 = 240 square feet

Step 2: Calculate total cost
Total cost = Area × Cost per square foot
Total cost = 240 × $6.00
240 × 6 = 1,440

So the total cost is $1,440

Problem 5: Base molding for Betty's room
- Need to find perimeter first (base molding goes around the edges)
- Cost: $3.00 per foot

Step 1: Find the perimeter of the room
Perimeter = 2 × (length + width)
Perimeter = 2 × (16 + 15)
Perimeter = 2 × 31
Perimeter = 62 feet

Step 2: Calculate total cost
Total cost = Perimeter × Cost per foot
Total cost = 62 × $3.00
62 × 3 = 186

So the total cost is $186

Problem 6: Rosy's farm
- Perimeter = 84 m
- Length = 12 m
- Need to find area

Step 1: Find the width using the perimeter formula
Perimeter = 2 × (length + width)
84 = 2 × (12 + width)
84 = 24 + 2 × width
84 - 24 = 2 × width
60 = 2 × width
width = 60 ÷ 2
width = 30 m

Step 2: Calculate the area
Area = length × width
Area = 12 × 30
Area = 360 square meters

So the area is 360 m²

Problem 7: Tina and Tony's banner
- Banner dimensions: 12 ft × 9 ft
- Cost: $3.00 per square foot

Step 1: Find the area of the banner
Area = length × width
Area = 12 × 9
Area = 108 square feet

Step 2: Calculate total cost
Total cost = Area × Cost per square foot
Total cost = 108 × $3.00
108 × 3 = 324

So the total cost is $324

Final Answer:
4. $1,440
5. $186
6. 360 m²
7. $324