Answer:
- π is the area of a circle of radius 1
- π is the circumference of a circle of diameter 1
- π is the constant of proportionality relating the diameter of a circle to its circumference
Step-by-step explanation:
Area of a circle = πr² or πd²/4
Circumference of a circle = 2πr or πd
r is the radius
d is the diameter
If radius = 1
Area = π(1)²
Area = π
hence π is the area of a circle of radius 1 is CORRECT
Given d = 1
Area = πd²/4
Area = π(1)²/4
Area = π/4
Hence π is the area of a circle of diameter 1 is INCORRECT
For the circumference;
C = 2πr or πd
If r =1
C = 2π(1)
C = 2π
Hence π is the circumference of a circle of radius 1 is INCORRECT
Also if d = 1;
C = πd
C = π(1)
C = π
hence π is the circumference of a circle of diameter 1 is CORRECT
Since C = πd, then π is the constant of proportionality relating the diameter of a circle to its circumference is CORRECT
Distribute -0.5 into 0.3x - 0.6 to get -0.15x + 0.3 = -1.5, then subtract 0.3 from both sides to get -0.15x = -1.8, then divide both sides by -0.15 to get 12.
No because a unit rare is something per something. For example, the answer for this problem would be 50 feet per second. It is 50 feet for every 1 second.
Hope that helps!!!
