Answer:I pretty sure it will be 12.5 I subtracted the total cost for the guitar by the money he already had and got 250 Then I did 250/20 and got 12.5 250 is the money that he still needs for the guitar
Let's calculate r of this G.P: (-20)/(4) = - 5(100)/(-20) = - 5So r = -5 The formula to find the nth term of a GP is; a(n) = a(r)ⁿ⁻¹ <u />a₆ = a(r)⁶⁻¹ a₆ = 4(-5)⁵ = -12500<u />
