Sharifah owes $61,000 to a private lender. The debt grows with 11% annual interest that compounds every week. How much will Sharifah owe in six months?

use this formula:

p(a\b) = p(a and b)/p(b).

take it from here.

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.