<span>a. True
The question is pretty much the entire definition of a radian. For an unit circle, its entire circumference is 2π and the entire circle has 2π radians. A quarter circle, or 90°, or π/2 radians, have 1/4th of the circumference. And 2π/4 is π/2. This natural relationship is WHY higher mathematics uses radians for the measurement of angles rather than arbitrary units such as degrees.</span>
9*12=108
4*x=4x
so, 4x/108
4x=108
x=27
Positive 20 and negative 10 is a net amount of 10. 10 minutes is 1/6 of an hour. 5*1/6=5/6km
Answer:-25
Step-by-step explanation:
simplify
Answer: 
Step-by-step explanation:
Given
The dimension of the box is
Space occupied by the box is equal to its volume i.e.
The volume of the box is .
