Question

Please help me answer questions 48 and 48 with the working out please. This is very urgent and i’m giving out 8 points not 5!!!

Answer 1

Answer: 65°

Explanation:

`E=w(t_f-t_o)\\\\E: 10\ cubic\ feet* (1000\ BTU)/(1\ cubic\ foot)* \ 60\%\quad \rightarrow \quad E=6000\ BTU\\\\\\w:50\ gallons* (8\ pounds)/(1\ gallon)\quad \rightarrow \quad w=400\ pounds\\\\\\\\E=w(t_f-t_o)\\\\6000=400(t_f-50)\\\\(6000)/(400)=(400(t_f-50))/(400)\\\\.\quad 15=t_f-50\\\\\\.\quad 15=t_f-50\\.\ \underline{+50}\quad \underline{\quad \ +50}\\.\quad 65=t_f`