Answer:
The domain is 
Step-by-step explanation:
Given functions
and 
Subtract these two functions:

Plot these difference on the coordinate plane (see attached diagram). This function is defined for all vlues of x, so the domain is 
Answer:
2.50$
Step-by-step explanation:
4 / 8 = 0.5
0.5 x 5 = 2.5
Answer:
D
Step-by-step explanation:
The diagonals of a rhombus bisect the angles, thus
∠ ABC = ∠ CBD = 5x - 18 and
∠ BAC = ∠ DAC = x
The diagonals are perpendicular bisectors of each other, thus
the angles round the intersection of the diagonals = 90°
Consider the triangle on the left of the rhombus, then
5x - 18 + x + 90 = 180 ( sum of angles in a triangle )
6x + 72 = 180 ( subtract 72 from both sides )
6x = 108 ( divide both sides by 6 )
x = 18 → D
Step 1: Find the circumference of the circle
C = 2pi * r
C = 2pi * 6
C = 12pi cm
Step 2: Multiply by the central angle over the whole
---We do this because we are only finding a part of the whole circumference. That part is determined by the central angle.
12pi x 30/360
12pi x 1/12
ARC = 1pi cm
Hope this helps!