Q11 — Mathematics (read-only)

Q11

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Experimental data show that a body's temperature declines exponentially in time according to the expression T(t) = 50e −0.04t (where 50 is a constant expressed in °C, 0.04 is the cooling rate in min−1, and t is the cooling time expressed in minutes). How long would it take the body to reach 25°C?

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A. 12.4 min

B. 15.6 min

C. 16.5 min

D. 17.3 min