which of the following equations represents a parabola that opens down and has a vertex at (3, -1)? Answer choices. A. y= -2(x-3
2 answers:
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Answer:
A. T=7.12°C; B. t=3.32min
Step-by-step explanation:
In order to find the answer we can use the Newton's law of cooling:
where:
y0=initial temperature - room temperature
k=coefficients
t=time
Because the outdoors temperature is 3°C, the initial temperature is 20°C, and because the thermometer reads 11°C after 1min we have:
A. Temperature after an extra minute.
so the answer is 7.12°C
B. Time in order to read 4°C