Lisa takes a loan of $10,500 at a 9% ssimple intrest rate for 7 years a) how much interesr will she pay after 3 years b) how much interes wil she pay in total for her loan

hey! so 1 (25) out of 4 (100) is 25 so your answer is 25%. it's like quarters!

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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