Please help me!! thank you <3

Determine the fraction of total interest owed. after the fourth month of a 12-month loan: the numerator is: {(n + ) + (n + ) + (n + ) + (n + )} = , and the denominator is: {(n) + (n + 1) + + (n + )} = . therefore, the fraction is numerator/denominator (to the nearest tenth) =

∆red ≅ ∆ by rule will give brainiest if possible

Pyramid shown has a square base that is 18 inches on each side has a surface area of 164 square inches what is the slant height