Brenda has a square-shaped photo frame. if the area of the square frame is 123 square inches, which statement is true?

a. the length of the photo frame is between 10 inches and 11 inches.
b. the length of the photo frame is 11 inches.
c. the length of the photo frame is between the 11 inches and 12 inches.
d. the length of the photo frame is 12 inches.

I thick this is C if I did the math right but it should be right tell me if I am right

, 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