Area of a circle is pi x r^2
R = d/2 = 14.2 = 7
Area = 3.14 x 7^2
Area = 3.14 x 49
Area = 153.86 round to 154
Answer is 154 square feet.
1: Perimeter
2:Dimensions
3:scale
Answer: Alvin = 42 yrs , Elga = 21 yrs
Step-by-step explanation:
Let Elga's age be x , and Alvin's age be y ,since Alvin is two times Elga's age , then
Alvin's age = 2x , that is
y = 2x ............... equation 1
The sum of their ages is 63 implies
x + y = 63 .............. equation 2
Solving the resulting linear equations by substitution method.
Substitute equation 1 into equation 2 , we have
x + 2x = 63
3x = 63
x = 63/3
x = 21
Therefore : Elga is 21 years old , then Alvin will be 21 x 2, which will be 42
