0.24 is the answer to this question
Answer:
X is 24.
Step-by-step explanation:
Divide the surface area by 4
Hello! :)
Step-by-step explanation:
<u><em>Therefore, the slope is -1/3.</em></u>
<u><em>-1/3 is the final answer.</em></u>
Hope this helps!
Have a nice day! :)
:D
-Charlie
Thank you!
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
The answer is x=20. Hope this helps.
