The sum of a geometric sequence is:
s(n)=a(1-r^n)/(1-r), a=initial term and r=common ration so
s(n)=20(1-0.25^n)/(1-0.25)
s(5)=20(1-0.25^5)/(0.75)
s(5)=26.640625
Answer: C
Step-by-step explanation:
Answer:
The last option
Step-by-step explanation:
arc DA is larger than a semicircle so the first answer is not correct
arc BOC is also larger than a semicircle so the second answer is not correct
arc DAC is also larger than a semicircle so the third answer is not correct
all arcs in the last options are shorter than the semicircle so the last option is correct
Answer: 3rd graph i think.
