Answer:
-21
Step-by-step explanation:
3x7=21 and a negative x a positive is always negative
The answer would be .80 or it may be 1
Answer: V = 1512 cm3
Step-by-step explanation:
Answer:
53.3324
Step-by-step explanation:
given that a thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F.
By Newton law of cooling we have
T(t) = 
where T (t) is temperature at time t,T =surrounding temperature = 40, T0 =70 = initial temperature
After half minute thermometer reads 60° F. Using this we can find k

So equation is

When t=1,
we get

I’m not sure if I remember well but I think it’s the answer!