For the rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78.

for an 14 month period, the last term is and the series sum is .

for a 16 month period, the last term is and the series sum is .

for a 20 month period, the last term is and the series sum is .

the answer is 288..

hope this

d is the only accurate one

step-by-step explanation:

is there a graph

step-by-step explanation:

an = 22 + (n-1) *6

110 seats

step-by-step explanation:

an=a1+(n-1)(d)

a1 = 22   this is the first item in the sequence

d =6   this is how the sequence goes up

a)   an = 22 + (n-1) *6

b) a12 = 22 + (12-1) *6

    a12 = 22+11*6

  a12 = 22 +88

  a12 = 110