(08.04 mc)
find the sum of the geometric sequence 3, 15, 75,375, when there are 8 terms and select the correct answer below.

292,968

Step-by-step explanation:

As we know,

Sum of a geometric sequence (S) =

where,

a = first term of sequence,

r = the constant ratio,

n = number of terms in sequence.

So, according to the question,

a = 3,

r = 5,

n = 8.

by substituting the values in the above formula, we get;

⇒

⇒

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation: