The math I used is probably not the quickest way, but for me, the easiest.
25*5=125 25+20=45 45*7=315 125+315=440 25*4=100 440+100=540 5+7+4=16
B is your answer.
A = P(1+i)ⁿ ==> compound interest where P= initial Capital, I =interest in% and n the number of years. A is the total amount collected over n years
A= 500(1.0325)¹² ==> 500(1+0.0325)¹² ==> 500(1+3.25%)¹²
The mistake is:
Either she has a yearly interest of 3.25% & she wrote 12 instead of 3 (years)
OR
She got a quarterly interest of 3.25% and in this case she should have divided 3.25& by 12 (4 quarter a year ==> 12 quarter for 3 years) by keeping as exponent the number 12 (right)
1)Now the Amount of A (as she wrote it) =500(1.0325)¹² = 734
2) If she wrote 12 instead of 3, and after correction A=500(1.0325)³ =550
3) But if she had taken the quarterly interest for a period of 3 years (12 Qrtr)
then A =500[1+(3.25%)/4]¹² = 551
Respuesta:
dieciséis
Explicación paso a paso:
100-ab - - - - (1)
100-ba - - - - (2)
Sumando (1) y (2) sumas hasta 24
100-ab + 100-ba = 24
100 + 100 - ab - ba = 24
200- (10a + b) - (10b + a) = 24
200-10a-b-10b-a = 24
200-24 = 10a + 10b + b + a
176 = 11a + 11b
176 = 11 (a + b)
176/11 = a + b
16 = (a + b)