Well... hmmm so.. for 500 bucks you only pay a rate of say "r", and it comes down to only 28cents, or $0.28.
If 500 is say the 100%, what percentage is 0.28?

now, we're assuming the company is charging and APR, so you pay that at the end of the year. We're also assuming the year is only 360 days.
so, if you borrow 1959 on simple interest for 251 days out of 360 days, how much are you repaying?

and surely you can do that one... which is just 1959 and a few pennies.
I think the second one let me know
Answer: x = 2/7
Step-by-step explanation: Hope this helps :)
Answer:
(√2/2,√2/2)
Step-by-step explanation:
In the unit circle, you have x and y, which are x = cos θ and y = sin θ.
So since the angle is 45 degrees, you have (cos θ, sin θ) which is (√2/2,√2/2).
Your welcome, comment if you have any questions! :D