A. The relation is not a function because each input has the same output.
B. The relation is not a function because each input should have a unique output.
C. The relation is not a function because each input has exactly one output.
D. The relation is a function because each input has the same output.

18.75 gallons

step-by-step explanation:

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.