Answer:
T = 47.1875°C
Step-by-step explanation:
Given:
Surrounding temp, Ts = 100°C
Initial Temperature ,T0= 20°C
Increase in temperature = 15°C
Final temperature, T = 20 + 15 = 35°C
Time, t = 9 seconds
Let's take Newton's law of cooling:

We'll solve for k

Divide both sides by -5


Let's now find the temperature of the ball after 18 seconds in boiling water.
Use the Newton's equation again:




T = 47.1875°C
Temperature of the ball after 18 seconds in boiling water is 47.1875°C
The answer for 1.3 (x+y)=
you first multiply 1.3 times x then 1.3 times y so you end up with 1.3x +1.3y
and for the second problem is 2.7d+d+8-6=
(2.7d+d)+(8-6)
3.7d+2
Answer:
4(4x-16)
Step-by-step explanation:
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