Answer:
(11.7+11.2+10.5+10.3+x)/5=11.7
(43.7+x)/5=11.7
43.7+x=58.5
x=14.8lb
Answer:
The temperature of metal after five years = -18.96875
Step-by-step explanation:
Given : Function 
where x is measured in hours
Another function is added h(x)=-x-3
therefore, the resultant function f(x)=h(x)+c(x)

For x=5



Therefore, The temperature of metal after five years = -18.96875