What is 3/8+2/5 equal if someone answers can you guys explain it to me

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?

Use a standard normal table to determine the probability. give your answer as a decimal to four decimal places. −1.5< < 1.5)