Answer:
nhjggggggggggggj
Step-by-step explanation:
D
D is the correct answer
Hi the picture has the answer and work, if you have any questions feel free to ask!!
(16 ×7×3)+(1/2×3×5×6)
=336+45
=381cubic inch
d=-4 and a=10
The sum of a arithmetic sequence is given by (n/2)*(2a+(n-1)d). Comparing coefficients with the given Sn, we have; a-d/2=12 and d/2=-2, d=-4 and a=10.
