Find the sum of the first 9 terms in the following geometric series. Do not round your answer. 64+32+16+...

127.75

Step-by-step explanation:

The sum of first "n" terms of a geometric series is given by the formula:

Where

a is the first term

n is the number of term

r is the common ratio

The first term is 64, so

a = 64

We want first 9 term's sum, so

n = 9

To get common ratio, we divide 2nd term by 1st term, so

32/64 = 1/2

r = 1/2

Now, substituting in formula we get our

The sum of the first 9 terms of this geometric series is 127.75

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)