The answer is A) 2/3 ^ 4 power
4 - 4y - y² = 0
-y² - 4y + 4 = 0
y = -(-4) ± √((-4)² - 4(4)(-1))
2(-1)
y = 4 ± √(16 + 16)
-2
y = 4 ± √(32)
-2
y = 4 ± 4√(2)
-2
y = 4 + 4√(2) or y = 4 - 4√(2)
-2 -2
y = -2 - 2√(2) or y = -2 + 2√(2)
The answer is C.
You would set the problem into slope-interslope form : y = mx + b.
Slope (m) = rate of change b = y-intercept
Therefore, your in the above:
m = 3
b = 0
The constant proportionality (slope) is 3 and the y-intercept is 0.
Circumference - 2 x PI x radius
Circumference - 2 x 3.14 x 18 = 113.04 units
