Answer:
28.1
Step-by-step explanation:
You can answer questions like this by working backwards.
To do this we can divide 78.2 by 2 and that gets us 39.1
Now we have to subtract 11 from it and that gets us our final answer:
28.1
If during a given month your average daily credit card balance is $800 and your yearly interest rate is 17%, then the interest you owe on your credit card for that month would be: $11.33
Polar form: (r,θ)
Using these formulas:
x²+y²=r²
tan(θ)=y/x
We have the point (1,1) in cartesian coordinates. We need to find r and θ to get it in polar form.
r²=1²+1²
r²=2
r=±√2
tan(θ)=1/1
tan(θ)=1
θ=π/4 radians or 45 degrees
Polar coordinates: (√2,π/4)
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