I'm in seventh grade. I haven't learned that yet.
try asking your teacher.
Answer:
Part 1) 
Par 2) 
Part 3) 
Step-by-step explanation:
step 1
Find the 
we have

Remember that

therefore

step 2
Find the 
we know that

we have

substitute




square root both sides

we have that
---> given problem
so

step 3
Find the 
we know that

we have


substitute

Simplify

The correct answer would be B because 88 divided by 11 would be 8 and therfore it would justift that the ration would be equal to 88:33
Answer:
81π
Step-by-step explanation:
-The sum of central angles in a circle add up to 360°.
-Let x be the area of the circle.
-Given the area of a 120° is 27π, the circles area can be calculated as:

Hence, the area of the circle is 81π
Answer:

Step-by-step explanation:
Volume of a cone=1540
, Radius=7cm.
The height of a cone=h
When we need to find the height of a cone, we can use the formula of the volume of a cone, which is
to find the height of a cone.

Put the pi value=22/7 and the value of radius which is 7 cm into the formula.


Move
to another side. 1540 divided by
to calculate what is the value of h, h is the height of a cone. Like this.


Rearrange the h.

I hope you will understand my solution and explanation. If you still cannot get the point, you can ask me anytime! Thank you!