Answer: Negative StartFraction 49 over 4 EndFraction divided by StartFraction 7 over 2 EndFraction;
49/4 ÷ 7/2
Step-by-step explanation:
Initial temperature: 0°
Final temperature: -12 1/4 ° = -(12x4 +1)/4 = -49/4
Time: 3 1/2 hours = (3x2+1)/2=7/2 hours
We have to apply the next formula:
∆T = r × t
r= ∆T/t
Where:
r =Rate of change of temperature
t =time = 7/2 hours
∆T =overall change in temperature = (-4.9/4-0)
Replacing with the values given:
(-12 1/4 -0 )/3 1/2= -49/4 ÷ 7/2 = -7/2
Negative StartFraction 49 over 4 EndFraction divided by StartFraction 7 over 2 EndFraction
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