A teacher identifies all freshman, sophomore, junior, and senior students at a local high school. She then selects a sample of 10 students in each class using a random sampling procedure before combining all selected students into one larger sample of 40 total students. What sampling method did the researcher use?

the inequality is:

250c+180g≥950

step-by-step explanation:

let c denotes the number of days in a week   miyoko worked as a cryptographer.

and g denotes the number of days in a week she works as a geologist.

now we are given that she earns $250 for every day she works as a cryptographer,and earns $180 for every day she works as a geologist.

now miyoko's goal is to earn more than $950 this week.

hence, the inequality could be represented as:

250c+180g≥950

she will travel a distance in the range of 3 - 11 miles

answer. d.289 hope that