The first term of a geometric sequence is 12 and the sum of the first two terms is 35. Work out the sum of the first 10 terms of the sequence.

Give your answer as a decimal correct to 3 significant figures.

8745.530

Step-by-step explanation:

a₁ = 12

S₂ = 12*(1-r²)/(1-r) = 35

12*(1+r)*(1-r)/(1-r) = 12(1+r) = 35

12r = 23           r = 23/12

S₁₀ = 12*(1-(23/12)¹⁰)/(1-(23/12)

     = 8745.530

215.92 dollars is the answer

the first one

step-by-step explanation:

just id the test.