Newton's Law of Cooling
Tf=Ts+(Ti-Ts)e^(-kt) where Tf is temp at time t, Ts is temp of surroundings, Ti is temp of object/fluid. So we need to find k first.
200=68+(210-68)e^(-10k)
132=142e^(-10k)
132/142=e^(-10k)
ln(132/142)=-10k
k=-ln(132/142)/10
k≈0.0073 so
T(t)=68+142e^(-0.0073t) so how long until it reaches 180°?
180=68+142e^(-0.0073t)
112=142e^(-0.0073t)
112/142=e^(-0.0073t)
ln(112/142)=-0.0073t
t= -ln(112/142)/(0.0073)
t≈32.51 minutes
Answer:
A. x - 38.45 = 17.71
Step-by-step explanation:
The price of the shirt subtracted off the amount of money she had before would give 17.71
Answer:
24 miles/gallon
Step-by-step explanation:
You divide 60 by 2.5 to get how many miles per gallon.
It's A.
The corresponding angles are the ones in matching corners (e.g 1 and 5, 2 and 6, etc.).
