The formula of the area of the circle is
Area = pi * (d/2)^2
So using the formula,
Area = 3.14 * (30/2)^2
Area = 3.14 * 15^2
Area = 706.5 ft^2
So the area of the hockey rink is 706.5 ft^2
Answer:
decay
2% decrease
Step-by-step explanation:
The growth factor is the base of the exponent: 0.98. Its relation to the rate of change is ...
growth factor = 1 + rate of change
0.98 = 1 + (-0.02)
So, the rate of change is -0.02 = -2%. Since the rate of change is a 2% decrease, it represents decay.
X + y = -3
<u>x - y = 13</u>
<u>2x</u> = <u>10</u>
2 2
x = 5
x + y = -3
5 + y = -3
<u>- 5 - 5</u>
y = -8
(x, y) = (5, -8)
Answer:
Total area: 314 km
Area of the 90 arc: 78.5 km
Step-by-step explanation:
total area/4
314/4=78.5 exactly