Over the course of five years a researcher sends 200 surveys by mail and receives 80 completed surveys back, in the next round of the research project the researcher wants to increase the number of surveys returned by 20. how many surveys should be sent out?

What is the length and width of a 84.5 square foot rug? will mark

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf