The Newton`s law of cooling:
T = R + ( To - R ) * e ^(-kt )
We know that: T = 32° F ( the water freezes at 32° F ), To = 55° F, R = 5° F
and the cooling rate is: k = 0.012.
33° F = 5° F + ( 55° F - 5° F ) · 2.72^(-0.012 t )
33 - 5 = 50 · 2.72^(-0.012 t)
27 = 50 · 2.72^(-0.012 t)
2.72^(-0.012 t) = 27/50
1 / 2.72^(0.012 t) = 0.54
2.72^( 0.012 t ) = 1 : 0.54 = 1.85
0.012 t = log(base e) 1.85 = ln 1.85 = 0.6
t = 0.6 : 0.012 = 50
Answer: It would take 50 minutes.
Answer:
i) Because so that we can understand them steps by step
ii)We could enjoy when we study in school
20 times 1/8+1/8+1/8+1/8+1/8=5/8 times 4 because of the four pots = 20
Answer:
.2
(
a
+
2
b
)
Step-by-step explanation:
Factor
2
out of
2
a
+
4
b
Four of them are pink so it’s 4/10 and 2/5
