Answer:
Search it up duh you idoit
Step-by-step explanation:
One plus 1 equal je 2
The person went wrong on step 2
Should be
11 + (9)(3)= x
11 + 27= x
x = 38
The answer would be -43/60 or -0.716 in decimal.
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:13 over 30
13/30 or 0.433
Step-by-step explanation: