An aritmetic sequcne is represented as

where
an=nth term
a1=first term
d=common differnce, or how much each term increases by
n=which term
example
1,3,5, etc
first term is 1
common difference is 2 because it increases by 2 each time
so the formula would be

if we had
5,3,1
first term s 5
common difference is -2 since it goes up by -2 each time
so formula is

hope this helps
Answer:
for the 5 inch radius one, 523.6 inches
for the 12 yd diameter one, 904.8
Step-by-step explanation:
gimme brainliest pls
I think its Philadelphia hopes this helps...
The answer would be 51y+140
Answer:
5.401×10^-1
Step-by-step explanation:
You move the decimal over one to get5.401×10^−1