A) The differential equation comes from the fact that the rate of temperature change is proportional to the difference in temperatures.

B) Find general solution by separating variables and integrating

:
C) Initial condition is t=0, T = 87

D) Total time elapsed is 10 minutes, new temperature is 84

solve for alpha

E) Temperature function is:

solving for t

Plug in T = 98.6

This is approximately 32 minutes before he arrived or about 1:20 AM
Answer:
Squares:
1 is 12.4in
6.2 x 6.2 = 12.4
2 is 21 in
5 1/2 x 4 = 21
Triangles:
1 is 48 in
16+16+16=48
2 is 21 in

hoped that helped:P
Step-by-step explanation:
Answer: 2 and 3
Step-by-step explanation:
all (-9,-7,-5) and (-33,-22,-11) are negative numbers less than -3. So those answers are possible answers. ps i had this question on my test too.
Answer:
equation: c + 10 = 3
Step-by-step explanation:
since 10 more = +10
c + 10 = 3