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

Answer:
31.1
Step-by-step explanation:
The difference between 8 and -9 is 17.
4 less than that is 13.
Answer:
2178 square inches
Step-by-step explanation:
5'6" means 5 feet and 6 inches.
1 foot = 12 inches, that means that you have 66 inches ((5*12) + 6).
2'9" are 33 inches.
The area of a rectangle is given by: A=L*W, then we have: A = 66 inches * 33 inches.
A=2178 square inches.