Answer:
The temperature difference in 5 minutes will be 12.38ºC
Step-by-step explanation:
The difference in temperature after t minutes is given by the following equation:
In which T(0) is the initial temperature and r is the decrease rate, as a decimal.
Decreases by 5% every minute.
This means that
What will the temperature difference be in 5 minutes if it is currently 16°C
This is T(5) when
So
The temperature difference in 5 minutes will be 12.38ºC
Answer:
The equation of the given circle is x
2
+y
2
=25
⇒ Centre =(0,0) and radius =5
Distance between point (−2.5,3.5) and centre (0,0)
=
(−2.5−0)
2
+(3.5−0)
2
=
6.25+12.25
=
18.5
=4.3(approx)<5
Since the distance between point (−2.5,3.5) and centre (0,0) of the circle is less than the radius of the circle.
Hence the point (−2.5,3.5) lies inside the circle.
Answer:
100π or about 314.16
Step-by-step explanation:
The formula for the area of a circle is (pi)*(radius^2)=area.
The radius is 10, so plugging that in you get pi*10^2=area.
Simplifying, you get Area=100π, or about 314.16
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