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Mathematics 12 Online
Lee:

Using the expression below, choose the correct answers for the new balance and amount of interest earned in the following compound interest problem. P(1 + r)n $1,100 at 8%, for 15 years, compounded annually. Total Amount = $ Interest Amount = $

Lee:

halp

kittybasil:

Patience, I am typing 😂 P = principal amount (which you are given as $1,100, or \(1100\)) r = rate (you're given 8%, which in decimal form would be \(0.08\)) n = 15 years, and since this is compounded annually you just plug it in as \(15\) As a result your equation should be:\[P(1+r)n\rightarrow1100(1+0.08)(15)\]

kittybasil:

Although I'm pretty sure I have never seen that form of equation before, I might be rusty when it comes to calculating interest rates... 🤔

kittybasil:

Ah, it's a simplified version of the original formula since your interest is compounded annually. Apologies

Lee:

thank you!

ramen:

do you know what the letters stand for?

kittybasil:

1 attachment
ramen:

P1rn?

Lee:

yes

kittybasil:

Hopefully that image helps!

ramen:

then we can start filling the blanks with p1rn

ramen:

what does what stand for?

Lee:

P principal R is rate n is time i is interest

ramen:

so we have the rate which is 8%

ramen:

yes

Lee:

k

ramen:

i will let you finish the rest

Lee:

i got da answer

Lee:

but thx

ramen:

good job

ramen:

thanks

Lee:

*standing ovation*

Lee:

was that for total amount or interest

Lee:

i am confusion

Lee:

oh nuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

darkknight:

When you calculate this 1100(1+0.08)(15) You get your total amount

Lee:

its not an answer for my choices

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