Answer: 
and

Step-by-step explanation:
Equation for a Circle

h= -2 k= 4 r= 4

Part 2
Complete the Square

Answer:
Step-by-step explanation: base x height
70ft
X = 35
use the formula a^2 + b^2 = c^2 in order to find the hypotenuse, which is x.
21^2 + 28^2 = c^2
441 + 784 = c^2
1225 = c^2
35 = c
x = 35
Answer: When the denominator of a fraction is equal to 1 and the numerator is nonzero, the value of the fraction is equal to the numerator of the fraction.