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17.10.2020 •
Mathematics
11. The temperature of coffee can be modeled by an exponential function. If the temperature of the coffee
was 86.1°C 3.0 minutes ago and the current temperature of the coffee is 79.9°C, what will the temperature of
the coffee be 29.0 minutes from now?
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Ответ:
x^2+y^2+8x-6y+21=0
Rewritten in the form of a standard circle equation:
(x-(-4))^2+(y-3)^2=2^2
Therefore, the circle properties are:
(a,b)=(-4,3),r=2
The radius of the circle whose equation is x^2 + y^2 + 8x - 6y + 21 =0 is 2.
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