Answer:


Step-by-step explanation:
Figure of cone is missing. See attachment
Given
Radius, R = 2m
Let L = KL=LM=KM
Required:
Volume, V and Surface Area, A
<u><em>Calculating Volume</em></u>
Volume is calculated using the following formula

Where R is the radius of the cone and H is the height
First, we need to determine the height of the cone
The height is represented by length OL
It is given that KL=LM=KM in triangle KLM
This means that this triangle is an equilateral triangle
where OM = OK = 
OK = 
Applying pythagoras theorem in triangle LOM,
|LM|² = |OL|² + |OM|²
By substitution
L² = H² + (
)²
H² = L² -
²
H² = L² (1 -
)
H² = L² 
H² = 
Take square root of bot sides


Recall that 




in terms of
an d L where L = KL = LM = KM
<u><em>Calculating Surface Area</em></u>
Surface Area is calculated using the following formula


)
)





Answer: A
Step-by-step explanation:
The correct answer is <span>(−9, −12)</span>
Answer:
120 pounds
Step-by-step explanation:
We can use systems of equations to solve this problem. Assuming j is Jim's weight and b is Bob's weight, the equations are:
j + b = 180
b - j = 1/2b
Let's get b - j = 1/2b into standard form (b, then j, then the equal sign, then the constant.)

Now we can solve using the process of elimination.

Now we know how much Bob weighs, for fun, let's find Jim's weight by substituting into the equation.

So Bob weighs 120 pounds and Jim weight 60 pounds.
Hope this helped!
The answer to this question is c i think