Answer:
The radius of the circle is 9 units.
Step-by-step explanation:
To calculate the area of the circle we need to find it's radius, since we have the area of the sector and it's angle, therefore we can calculate the radius by using the following formula:
sector area = (central angle)*pi*r²/360
27pi = 120*pi*r²/360
27pi = pi*r²/3
27 = r²/3
r² = 81
r = sqrt(81) = 9
The radius of the circle is 9 units.
Answer:
Time taken by the submarine to reach the cave is 10 seconds.
Step-by-step explanation:
We are given that,
The elevation of the underwater cave = -120 feet.
The rate at which the submarine descends to the cave = -12 feet per second
Thus, we have,
The time taken by the submarine to reach the cave =
= 10 seconds.
Hence, the time taken by the submarine to reach the cave is 10 seconds.
The percent of change=the amount of change/the starting number
in this case, the amount of change is 36-6=30
the starting number is 6
the percent of change is therefore: 30/6=5=500%
Answer:
Y = x^2 - 2x - 15
Step-by-step explanation: