Answer:
56
Step-by-step explanation:
Answer:
Step-by-step explanation:
<u>Given infinite geometric series</u>
- 1/4, 1/5, 4/25, 16/125, ...
<u>We see that</u>
<u>Sum of the series</u>
- S = a*1/(1 -r)
- S = 1/4*1/(1 - 4/5) = 1/4*1/(1/5) = 1/4*5 = 5/4
D.
first of all we know if a half circle rotates 360°we will get a sphere, with a quarter circle, we will get a semi sphere. therefore we can eliminate choices A and B
with the diagram, the radius is 5, the diameter is 5*2=10 which means D is the correct answer
