When is it logical to use 22/7 instead of 3.14 for pi

To ? nd out how many students are unhappy with the dining hall food, you distribute a survey. which method of surveying would produce the least amount of bias in your data?

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Which are factor pairs of 350? choose all answers that are correct. a) 30 and 12 b) 35 and 10 c) 70 and 5 d) 2 and 125