There are letter tiles in a bag. Four A's, five b's, six c's and 5 d's. You select one tile, replace it and then draw another. P(C AND D).. A. 3/40. B. 11/20. C. 11/40. D. 6/20

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99

Why is the bottom layer of a trophic pyrimid the

How many grams of ammonia would be produced by the decomposition of 16.93 mlof hydrazine? (the density of hydrazine is 1.021g/ml)