Melody

I'll try and be around a bit Rosala.  I just canot be around as much as usual.

I am glad you are here to watch over the forum for me 

R=2000

n=4  (because 4 payments left)

i = 2% = 0.02

This is the present value of an ordinary annuity problem.

$$\boxed{A=R\times \frac{1-(1+i)^{-n}}{i}}\\\\
A=2000\times \frac{1-1.02^{-4}}{0.02}\\\\
A=\$7615.46$$

You know the initial amount and the end amount is 0

therefore it is a psesent value of an annuity question. It is an ordinary one because banks add the payments are made at the end of time periods (that is how banks work)

You haven't said how often the payments are made so I will assume yearly.

$$\boxed{A=R\times \frac{1-(1+i)^{-n}}{i}}$$

Actually on examination of the question it does not make a lot of sense.

I can work it out but it is not something you would ever bother with. Oh well not to worry.

n=5, A=1 200 000, n=5, i=0.24

You need to work out R which is your regular payment,

Mmm now it gets a bit obsure.

If you get that far maybe we can look at it together and work out what the question asker actually wants.  

You can work out total interest easily enough but each year a different amount of interest will be paid.

This question makes no sense. Sorry.

 $$\\\mbox{You can expand this the long way but you should remember that}\\\\
\boxed{(a\pm b)^2=a^2\pm 2ab+b^2}\\\\

(3\sqrt{6}-5)^2\\
=(3\sqrt6)^2-[2*3\sqrt6*5]+5^2\\
=9*6-30\sqrt6+25\\
=54+25-30\sqrt6\\
=79-30\sqrt6\\$$

Thurs 14/8/14

What to do to combat pop-ups

@@ End of Day Wrap :   WEd 13/8/14      Sydney, Australia     Time 9:15pm      ♬  

Hello all,

Most US students were back to school today and the forum was immediately busier.  Our wonderful answerer today included Alan, Will85237, AzizHusain, CPhill, NonjaDevo, Kitty<3, TakahiroMaeda, and Rosala. Thank you all.

I only put aside a couple of post today and here they are:

Some fun here.  

I do not know - I am sorry.

26) Just use the compound int formula

FV=P(1+r)^n

where P=2000

n=number of years

r=0.04

I assume that you want to find the hypotenuse in a right angled triangle.

$$\\h^2=94^2+66^2\\
h^2=13192\\
h\approx 114.856\;inches$$