For this case we have that by definition, the surface area of a cone is given by:

Where:
A: It's the radio
s: It's the slant
Substituting according to the data we have:

If we round:

Answer:
True
Answer:
40%
Step-by-step explanation:
Answer:
156.37°
Step-by-step explanation:
We solve this above question, using Cosine rule which is given as:
Cos C = a² + b² - c²/2ab
Let the Angle be represented as: x
Cos x = 310² + 200² - 150²/2 × 310 × 200
x = arc cos [ 310² + 200² - 150²/2 × 310 × 200]
x = 23.63°
The angle, in degrees, that he must turn through to head straight for Island B is given as:
180° - 23.63°
= 156.37°
1 1/6 = 7/5
2 1/2 = 5/2
1 1/2 = 3/2
This is what I got hope I'm correct.