In order to take a sample of 1200 people from a population, i first divide the population into men and women, and then take a simple random sample of 500 men and a separate simple random sample of 700 women. this is an example of a:

a. randomized comparative experiment.
b. stratified random sample.
c. a simple random sample.
d. a multistage sample.
e. convenience sampling

In a coastal town, the humidity, measured in grams of water per kilogram of air, increases by 43% for every 1 degree celsius increase in temperature. a scientist observes that the humidity on monday morning is 5.75 grams per kilogram. he wants to know how much the temperature must increase for the humidity to reach at least 49.17 grams per kilogram. let t represent the increase in temperature, in degrees celsius, from monday morning's observation. write an inequality to represent the situation, and use it to determine the desired temperature increase.