Answer:
C I think. Sorry if it's incorrect but I pretty sure it isn't.
Answer: 9
Step-by-step explanation:
Use Pythagorean's Theorem for a right triangle.


Answer:

Step-by-step explanation:
The equation for exponential decay function is given as:

where:
D(t)= difference in temperature t=time
r=rate of change
a =initial value of the temperature
From the given problem:
Initial Temperature,a=50°C
Rate of Decay,r=
Therefore the function for the difference in temperature is given as:


We can convert
to decimal and write the function as:
