Answer:
Below in bold.
Step-by-step explanation:
Nth term an = a1 + d(n - 1) where a1 = term 1 and d = common difference.
Here a1 = 5 and d = 8-5 = 3.
So an = 5 + 3(n - 1)
15th term a15
= 5 + 3(15 - 1)
= 5 + 42
= 47.
Since BD Bisects ABC,
Hence,
Angle CBD=Angle DBA
-> 55°=x°+12°
-> x° =55°-12°
-> x° =43°
96 cubic inches
8x3=24=area x4 = 96 = volume
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<em>NOT VALID</em>