300 high school students were asked how many hours of tv they watch per day. The mean was 2 hours, with a standard deviation of 0.5. using a 90% confidence level, calculate the maximum error of estimate​

1. during first 10 seconds 2. between 10 seconds and 35 seconds 3. during 35 seconds to 40 seconds

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

2x minus y equals 6, x plus y equals negative 3