A high school committee wants to estimate the proportion of students that are pleased with the cleanliness of campus. They consider two methods of obtaining a sample of 400 students from the 2500 students at the school. Part A: to make the process easier, the committee consider serving the first 400 students who enter the gym during the schools first Pepper alley. Identify the type of sampling method proposed and discussed by the sampling method might be biased.

Part B: The second message the committee is contemplating involves using a random number generator app to choose a simple random sample of 400 students from a list of 2500 student names. How could they implement this method?

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Students at a high school were asked about their favorite outdoor activity. the results are shown in the two-way frequency table below. fishing camping canoeing skiing total boys 36 44 13 25 118 girls 34 37 22 20 113 total 70 81 35 45 231 select all the statements that are true based on the given table. more girls chose camping as their favorite outdoor activity than boys. more girls chose canoeing as their favorite outdoor activity than those who chose skiing. more boys chose skiing as their favorite outdoor activity than girls. there were more boys surveyed than girls. twice as many students chose canoeing as their favorite outdoor activity than those who chose fishing. more students chose camping as their favorite outdoor activity than the combined number of students who chose canoeing or skiing.

Is the number 128.439 a rational number