Asteam generation system at a biomass fueled power plant uses an electrostatic precipitator (esp) to clean its gaseous effluents. the power plant has consistently made use of the same type of esp over past several years. the installed cost of a new esp has been relatively constant at $80,000. records of operation and maintenance expenses indicate the following averag expenses per year as a function of the age of the esp the mvs of the esp are also reasonably well known as a function of age.
col1 year 1 2 3 4 5
col2 o& m expense s30,000 $30,000 s35,000 $40,000 s45,000
col3 market value 60,000 50,000 40.000 25,000 12,500
determine the best time to replace the esp if the marr is l 5% per year.

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Which of those sequences is a geometric sequence

Jason went to an arcade to play video games. he paid $2 for every 11 tokens he bought. he spent a total of $16 on tokens. which equation can be used to determine,t, the number lf tokens jason bought