450 because the tens would be 20,20,30,40 and so on so u would round which 10 it's closer to 50 or 60 it's closer to 50 which is why the answer is 450
Answer:
16/49
i dont have an explaination i just used somthing but it wont let me say it uh yea
I don’t see a expression...
Ok so to find the ratio just do 12/16 = 3/4. that's your common ratio.
The formula for sum of infinite :
a / (1 - r)
a is the first term and r is the ratio
which is
16 / (1 - (3/4))
which is
16 / (1/4)
16 * 4
which is 64
