Determine which of the following relations is a function. (Lesson 1-7) A.{(–4, 3), (−2, −2), (0, 2), (0, 5)}
B.{(−3, 1), (−3, 3), (−2, −1), (0, 5)}
C.{(−4, −1), (−2, −1), (−1, −1), (3, 3)}
D.{(2, −5), {−1, −1), (0, 4), (2, −3)}

c

Step-by-step explanation:

c is a function because the x variables don't repeat. You can't have the same number in x variable position repeat.

The answer is 172.8 g.

The volume of the cube (V) is:
V = a³            (a - the side of the cube)

The density (D) is quotient of mass (m) and volume (V):
D = m/V = m/a³
⇒ m = D · a³


It is given:
D = 2.7 g/cm³
a = 4 cm
Therefore:
m =  D · a³ = 2.7 · 4³ = 172.8 g