Choose 3 students from each classroom to rate the lunch quality. What type of sampling method is being described?

a) systematic sample
b) Stratified sample
c) Convenience sample
d) Simple random sample

Can someone help me please?

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Which linear inequality is represented by the graph?

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7