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Mathematics
Mathematics
Problem
When the radius of a circle is decreasing, which statement about
d
A
d
t
\dfrac{dA}{dt}
d
t
d
A
is necessarily true? a)
d
A
d
t
\dfrac{dA}{dt}
d
t
d
A
is positive b)
d
A
d
t
\dfrac{dA}{dt}
d
t
d
A
is zero c)
d
A
d
t
\dfrac{dA}{dt}
d
t
d
A
is negative d) Sign of
d
A
d
t
\dfrac{dA}{dt}
d
t
d
A
cannot be determined from the given information
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