The reference angle is a positive acute angle. Angle 7π/6 in radians= = 7*180°/6 = 210° ( because π rad=180°).
This angle is in the 3rd Quadrant and formula for the reference angle is:
x-180°.
210°-180°=30°
Answer: The reference angle for 7π/6 is 30°.
Okay so your partner describes a situation that has a slope of NEGATIVE 5, not positive 5 as your teacher asked.
Instead, your younger brother could have started with 100 and GAINED 5 every month, instead of losing 5.
Answer:

Step-by-step explanation:
The formula of a volume of a cylinder:

The formula of a volume of a cone:

The volume of a cone is equal the volume of a cylinder.
Therefore we have the equation:
<em>divide both sides by πh</em>
<em>multiply both sides by 3</em>

The answer is the second one.
See attachment file below.
Hope it helped!!