In a circle, area and circumference can be found using the formulas A = xr² and C = 2nr, respectively. Write a formula for A in terms of
C. (Your answer should not contain r.)
Please help!!!

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step-by-step explanation:

hopefully im right

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for