Answer:
10/cot 62 degrees
Step-by-step explanation:
Answer:
I hope that this can help you
Answer:
2 hours and 37.5 mins
I think
Step-by-step explanation:
2/7 : 3/4
divide both sides by 2
1/7 : 3/8
multiply both sides by 7
1 : 21/8
simplify
1 : 2 5/8
change 2 5/8 to hours and mins
2 hours and 37.5 mins
212°F
147°F
23.2 min
1) Initial temperature for t=0
T(0)=68+144e^(0)=68+144=212°F
2) After 15 min
T(15)=68+144e^(-0.04*15)=68+144e^(-0.6)=147°F
3) 125°F -> t=?
125=68+144e^(-0.04t)
144e^(-0.04t)=125-68=57
e^(-0.04t)=57/144=0.4 you can apply ln on both sides:
-0.04t=ln(0.4) solving you get t=23.3 min
