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Zach borrowed four thousand dollars from his grandfather to buy a used car so he could travel to and from work. After working for 3 years, he has saved five thousand nine hundred twenty dollars to pay back to his grandfather. At what interest rate did Zach borrow the money?

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i am assuming simple interest as you havent mentioned anything now principal amount=P=4000 rate of interest per annum=R=? t=no. of years borrowed for=3 now he is paying an interest of "I'=total final amount-borrowed principal= 1900 now I=(P x R x t)/100 1900=(4000x R x 3)/100 solve, you should get the rate of interest per annum. multiply by 100 to get interest %age.
I agree.^
lol life

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what does that equal btw
Whatever it should equal.
i need help again
Well it's true!
with? what@jack
understanding this guys answer...its right but what is the percentage
ooh a medal...thanks@life and jack
Cuz I'm awesome like that...Jack you need to figure out the answer Lazy Doctors now! Humph. I'll never go into surgery with you around! You might be too lazy to figure out if I need my lungs!
u dont need your lungs id be happy to remove them heh heh heh
I'm pretty sure I need all 4 humph.
werewolf trash
Dog poop!
buttbreath? thats pretty serious
your the dog not me
thats biskerz your lookin at
werewolfs get em too
So does your dog HAHAHA
no he doesnt take it back
i hate u your not my fan anymore u insulted my cute dog
You insulted my werewolf lineage!
im sorry
ME too cabbagebrain..
what ever
I have several bees nest in my yard.
i gtg
bye jack
no more fighting now
Simple Interest formula: I = p r t <=> r = I/ p * t The difference amount between borrowed and paid back is the interest: I = $5,920 - $4,000 = $1,920 => Interest rate: r = 1,920 / 4,000 * 3 = .16 = 16%
i remember this from chat almost a month ago
XD that was amazing, and whats even better at the end the answer was there "16%"

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