To find the time \( t \) when the temperature reaches its minimum, we need to find the vertex of the quadratic function \( T(t) = 3t^2 - 12t + 20 \). The vertex form of a quadratic function \( at^2 + bt + c \) gives the time of minimum (or maximum) as \( t = -\frac{b}{2a} \).

Sun, 03 May 2026 01:30:27 +0000

Content under review