Answer:
≈ 18.8 cm
Step-by-step explanation:
The arc length is calculated as
arc = circumference of circle × fraction of circle
The central angle is equal to the arc subtending it, that is 60°
arc = 2πr × 
= 2π × 18 × 
= 36π × 
= 6π ≈ 18.8 cm ( to 1 dec. place )
Answer:
The resultant velocity of the airplane is 213.41 m/s.
Step-by-step explanation:
Given that,
Velocity of an airplane in east direction, 
Velocity of wind from the north, 
Let east lies in the direction of the positive x-axis and north in the direction of the positive y-axis.
We need to find the resultant velocity of the airplane. Let v is the resultant velocity. It can be calculated as :


v = 213.41 m/s
So, the resultant velocity of the airplane is 213.41 m/s. Hence, this is the required solution.
Answer:
k
=
2
√
19
,
−
2
√
19
Step-by-step explanation:
Take the root of both sides and solve.
Answer:
The mean is 77.8125
Step-by-step explanation:
The mean is the average of the numbers. It is very easy to calculate and get. All you have to do is add up all the numbers and divide it by how many numbers there are.
80 + 90 + 81 + 86 + 100 + 77 + 75 + 96 + 65 + 87 + 58 + 80 + 36 + 73 + 70 + 91 = 1245

Answer:
1 ton is equal to 2000 lbs
To find how many lbs is 3 tons, multiply 2000 by 3
2000 times 3 is 6000
So, 3 T = 6000 lbs
Hope I helped!